Advanced Digital Syntax Documentation

Select the device type from the right hand column and a link will take you to detailed documentation for that device, including the definition of each of the parameters that are used to model the device. Where needed, there is a link to Additional documentation that may contain waveform diagrams defining critical delay intervals and other special device behavior.

General Documentation:

Inertial Delay

Any Input to Output delay for the new Advanced Digital components incorporates inertial delay where, if the pulse width of the incoming signal is less than the Input to Output delay of a particular device, then there is no resulting change in the output. In the example below, one of the input pulses is narrower than the input-to-output delay of a buffer logic gate. In that instance, the output of the buffer gate effectively "ignores" that one input pulse.

This inertial delay behavior describes the Delay parameter for all the Advanced Digital Logic Gates as well as the Out Delay of the Adder, Subtracter, Multiplier, Comparator and Latches and each of the delay parameters of the Analog-to-Digital Converters, Counters and Flip Flops.

None of the delay parameters of the SIMPLIS Advanced Digital components may be set to zero.

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Transport Delay

By contrast, the Classic SIMPLIS digital gates model transport delay, in which they are able to respond to any width signal at their input and reproduce that same width signal at the output after the specified delay interval.

The Classic Digital components may have their delay parameters set to zero.

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Flip-Flop Delay Parameters

This example shows an edge triggered D-type flip flop with asynchronous set and reset. In this example, Set and Reset are selected to be active high. The following diagram shows the definition of the Clk to Output Delay as well as the Set/Reset Delay. All Flip Flop devices have a Clk to Output Delay parameter and all Flip Flops with the Set and Reset feature have a Set/Reset Delay.

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Flip-Flop Minimum Clock Width

As in this example of a D-type flip flop, where the device is set to trigger on the positive going edge of the clock, if the width of the clock pulse is narrower than the specified Minimum Clock Width, the clock pulse is ignored.

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Discrete Filters

Device Operation:

Each of these discrete filters is driven by an input clock signal. For proper operation, the input clock signal needs to be made up of a train of pulses with pulse widths equal to or wider than the "Time of Acquisition" set for the filter. For the most efficient simulation, this kind of pulses can be generated by driving periodic pulses through the "Sampling Clock Generator for Discrete Filters." If the "Sampling Clock Generator for Discrete Filters" is used to generate the input clock signals for the discrete filters, the driving periodic pulses can have pulse widths shorter than the time of acquisition as long as they are well defined pulses.

If the time of acquisition is tACQ, then the "Sampling Clock Generator for Discrete Filters" will generate a pulse whose pulse width is equal to tACQ every time its "TRIG" input makes a positive transition exceeding 3V. During this pulse, the discrete filter will sample the input data at the "IN" input pin and it will take tACQ for it to satisfactorily acquire the input data. After tACQ has expired, the discrete filter will update its output, and the output will settle within a time duration less than or equal to tACQ. In addition, during this duration when the output is updated, the output "CLK_OUT" is raised to a high value.

A discrete filter with more than two poles can be synthesized through a cascade of one-pole and/or two-pole discrete filters. In such case, the timing signal for each driven stage is derived from the "CLK_OUT" signal of the immediately preceding stage.

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Flip-Flops:

D-Type Flip-Flop | D-Type Flip-Flop w/ SET/RST | S/R Flip-Flop | S/R Flip-Flop w/ SET/RST | J/K Flip-Flop | J/K Flip-Flop w/ SET/RST | Toggle Flip-Flop | Toggle Flip-Flop w/ SET/RST | top

D-Type Flip-Flop

Clk to Output Delay

Property Name:CLK_TO_OUT_DELAY (Additional Info)
Data Type:NUMBER
Description:Delay from triggering edge of clock until output changes

Ground Ref

Property Name:GNDREF
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has a ground reference pin

Hold Time

Property Name:HOLD_TIME
Data Type:NUMBER
Description:Minimum time that input data signals must remain constant after triggering clock edge to register as a valid change in input state

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Options:0, 1
Description:Initial condition of the flip-flop's output

Minimum Clk Width

Property Name:MIN_CLK (Additional Info)
Data Type:NUMBER
Description:Minimum valid clock width

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Setup Time

Property Name:SETUP_TIME
Data Type:NUMBER
Description:Minimum time that input data signals must remain constant before triggering clock edge to register as a valid change in input state

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Trigger Condition

Property Name:TRIG_COND
Data Type:STRING
Options:0_TO_1, 1_TO_0
Description:Determines the triggering condition of the clock pin, either the rising edge or the falling edge

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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D-Type Flip-Flop w/ SET/RST

Clk to Output Delay

Property Name:CLK_TO_OUT_DELAY (Additional Info)
Data Type:NUMBER
Description:Delay from triggering edge of clock until output changes

Ground Ref

Property Name:GNDREF
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has a ground reference pin

Hold Time

Property Name:HOLD_TIME
Data Type:NUMBER
Description:Minimum time that input data signals must remain constant after triggering clock edge to register as a valid change in input state

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Options:0, 1
Description:Initial condition of the flip-flop's output

Minimum Clk Width

Property Name:MIN_CLK (Additional Info)
Data Type:NUMBER
Description:Minimum valid clock width

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Set/Reset Delay

Property Name:SET_RESET_DELAY (Additional Info)
Data Type:NUMBER
Description:Delay from time set / reset pin goes active until output is set / reset

Set/Reset Level

Property Name:SET_RESET_LEVEL
Data Type:INTEGER
Options:0, 1
Description:Determines the set / reset level of a device, 1 means active high, 0 means active low

Set/Reset Type

Property Name:SET_RESET_TYPE
Data Type:STRING
Options:SYNC, ASYNC
Description:Determines whether or not output events are synchronized with a clock event

Setup Time

Property Name:SETUP_TIME
Data Type:NUMBER
Description:Minimum time that input data signals must remain constant before triggering clock edge to register as a valid change in input state

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Trigger Condition

Property Name:TRIG_COND
Data Type:STRING
Options:0_TO_1, 1_TO_0
Description:Determines the triggering condition of the clock pin, either the rising edge or the falling edge

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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S/R Flip-Flop

Clk to Output Delay

Property Name:CLK_TO_OUT_DELAY (Additional Info)
Data Type:NUMBER
Description:Delay from triggering edge of clock until output changes

Ground Ref

Property Name:GNDREF
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has a ground reference pin

Hold Time

Property Name:HOLD_TIME
Data Type:NUMBER
Description:Minimum time that input data signals must remain constant after triggering clock edge to register as a valid change in input state

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Options:0, 1
Description:Initial condition of the flip-flop's output

Minimum Clk Width

Property Name:MIN_CLK (Additional Info)
Data Type:NUMBER
Description:Minimum valid clock width

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Setup Time

Property Name:SETUP_TIME
Data Type:NUMBER
Description:Minimum time that input data signals must remain constant before triggering clock edge to register as a valid change in input state

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Trigger Condition

Property Name:TRIG_COND
Data Type:STRING
Options:0_TO_1, 1_TO_0
Description:Determines the triggering condition of the clock pin, either the rising edge or the falling edge

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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S/R Flip-Flop w/ SET/RST

Clk to Output Delay

Property Name:CLK_TO_OUT_DELAY (Additional Info)
Data Type:NUMBER
Description:Delay from triggering edge of clock until output changes

Ground Ref

Property Name:GNDREF
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has a ground reference pin

Hold Time

Property Name:HOLD_TIME
Data Type:NUMBER
Description:Minimum time that input data signals must remain constant after triggering clock edge to register as a valid change in input state

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Options:0, 1
Description:Initial condition of the flip-flop's output

Minimum Clk Width

Property Name:MIN_CLK (Additional Info)
Data Type:NUMBER
Description:Minimum valid clock width

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Set/Reset Delay

Property Name:SET_RESET_DELAY (Additional Info)
Data Type:NUMBER
Description:Delay from time set / reset pin goes active until output is set / reset

Set/Reset Level

Property Name:SET_RESET_LEVEL
Data Type:INTEGER
Options:0, 1
Description:Determines the set / reset level of a device, 1 means active high, 0 means active low

Set/Reset Type

Property Name:SET_RESET_TYPE
Data Type:STRING
Options:SYNC, ASYNC
Description:Determines whether or not output events are synchronized with a clock event

Setup Time

Property Name:SETUP_TIME
Data Type:NUMBER
Description:Minimum time that input data signals must remain constant before triggering clock edge to register as a valid change in input state

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Trigger Condition

Property Name:TRIG_COND
Data Type:STRING
Options:0_TO_1, 1_TO_0
Description:Determines the triggering condition of the clock pin, either the rising edge or the falling edge

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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J/K Flip-Flop

Clk to Output Delay

Property Name:CLK_TO_OUT_DELAY (Additional Info)
Data Type:NUMBER
Description:Delay from triggering edge of clock until output changes

Ground Ref

Property Name:GNDREF
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has a ground reference pin

Hold Time

Property Name:HOLD_TIME
Data Type:NUMBER
Description:Minimum time that input data signals must remain constant after triggering clock edge to register as a valid change in input state

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Options:0, 1
Description:Initial condition of the flip-flop's output

Minimum Clk Width

Property Name:MIN_CLK (Additional Info)
Data Type:NUMBER
Description:Minimum valid clock width

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Setup Time

Property Name:SETUP_TIME
Data Type:NUMBER
Description:Minimum time that input data signals must remain constant before triggering clock edge to register as a valid change in input state

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Trigger Condition

Property Name:TRIG_COND
Data Type:STRING
Options:0_TO_1, 1_TO_0
Description:Determines the triggering condition of the clock pin, either the rising edge or the falling edge

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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J/K Flip-Flop w/ SET/RST

Clk to Output Delay

Property Name:CLK_TO_OUT_DELAY (Additional Info)
Data Type:NUMBER
Description:Delay from triggering edge of clock until output changes

Ground Ref

Property Name:GNDREF
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has a ground reference pin

Hold Time

Property Name:HOLD_TIME
Data Type:NUMBER
Description:Minimum time that input data signals must remain constant after triggering clock edge to register as a valid change in input state

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Options:0, 1
Description:Initial condition of the flip-flop's output

Minimum Clk Width

Property Name:MIN_CLK (Additional Info)
Data Type:NUMBER
Description:Minimum valid clock width

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Set/Reset Delay

Property Name:SET_RESET_DELAY (Additional Info)
Data Type:NUMBER
Description:Delay from time set / reset pin goes active until output is set / reset

Set/Reset Level

Property Name:SET_RESET_LEVEL
Data Type:INTEGER
Options:0, 1
Description:Determines the set / reset level of a device, 1 means active high, 0 means active low

Set/Reset Type

Property Name:SET_RESET_TYPE
Data Type:STRING
Options:SYNC, ASYNC
Description:Determines whether or not output events are synchronized with a clock event

Setup Time

Property Name:SETUP_TIME
Data Type:NUMBER
Description:Minimum time that input data signals must remain constant before triggering clock edge to register as a valid change in input state

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Trigger Condition

Property Name:TRIG_COND
Data Type:STRING
Options:0_TO_1, 1_TO_0
Description:Determines the triggering condition of the clock pin, either the rising edge or the falling edge

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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Toggle Flip-Flop

Clk to Output Delay

Property Name:CLK_TO_OUT_DELAY (Additional Info)
Data Type:NUMBER
Description:Delay from triggering edge of clock until output changes

Ground Ref

Property Name:GNDREF
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has a ground reference pin

Hold Time

Property Name:HOLD_TIME
Data Type:NUMBER
Description:Minimum time that input data signals must remain constant after triggering clock edge to register as a valid change in input state

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Options:0, 1
Description:Initial condition of the flip-flop's output

Minimum Clk Width

Property Name:MIN_CLK (Additional Info)
Data Type:NUMBER
Description:Minimum valid clock width

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Setup Time

Property Name:SETUP_TIME
Data Type:NUMBER
Description:Minimum time that input data signals must remain constant before triggering clock edge to register as a valid change in input state

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Trigger Condition

Property Name:TRIG_COND
Data Type:STRING
Options:0_TO_1, 1_TO_0
Description:Determines the triggering condition of the clock pin, either the rising edge or the falling edge

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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Toggle Flip-Flop w/ SET/RST

Clk to Output Delay

Property Name:CLK_TO_OUT_DELAY (Additional Info)
Data Type:NUMBER
Description:Delay from triggering edge of clock until output changes

Ground Ref

Property Name:GNDREF
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has a ground reference pin

Hold Time

Property Name:HOLD_TIME
Data Type:NUMBER
Description:Minimum time that input data signals must remain constant after triggering clock edge to register as a valid change in input state

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Options:0, 1
Description:Initial condition of the flip-flop's output

Minimum Clk Width

Property Name:MIN_CLK (Additional Info)
Data Type:NUMBER
Description:Minimum valid clock width

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Set/Reset Delay

Property Name:SET_RESET_DELAY (Additional Info)
Data Type:NUMBER
Description:Delay from time set / reset pin goes active until output is set / reset

Set/Reset Level

Property Name:SET_RESET_LEVEL
Data Type:INTEGER
Options:0, 1
Description:Determines the set / reset level of a device, 1 means active high, 0 means active low

Set/Reset Type

Property Name:SET_RESET_TYPE
Data Type:STRING
Options:SYNC, ASYNC
Description:Determines whether or not output events are synchronized with a clock event

Setup Time

Property Name:SETUP_TIME
Data Type:NUMBER
Description:Minimum time that input data signals must remain constant before triggering clock edge to register as a valid change in input state

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Trigger Condition

Property Name:TRIG_COND
Data Type:STRING
Options:0_TO_1, 1_TO_0
Description:Determines the triggering condition of the clock pin, either the rising edge or the falling edge

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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Gates:

AND Gate | NAND Gate | OR Gate | NOR Gate | Exclusive-OR Gate | Comparator | Buffer | Inverter | top

AND Gate

Delay

Property Name:DELAY (Additional Info)
Data Type:NUMBER
Description:Delay from time an input pin goes active until output changes

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Options:0, 1
Description:Initial condition of the gate's output

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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NAND Gate

Delay

Property Name:DELAY (Additional Info)
Data Type:NUMBER
Description:Delay from time an input pin goes active until output changes

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Options:0, 1
Description:Initial condition of the gate's output

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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OR Gate

Delay

Property Name:DELAY (Additional Info)
Data Type:NUMBER
Description:Delay from time an input pin goes active until output changes

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Options:0, 1
Description:Initial condition of the gate's output

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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NOR Gate

Delay

Property Name:DELAY (Additional Info)
Data Type:NUMBER
Description:Delay from time an input pin goes active until output changes

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Options:0, 1
Description:Initial condition of the gate's output

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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Exclusive-OR Gate

Delay

Property Name:DELAY (Additional Info)
Data Type:NUMBER
Description:Delay from time an input pin goes active until output changes

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Options:0, 1
Description:Initial condition of the gate's output

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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Comparator

Delay

Property Name:DELAY (Additional Info)
Data Type:NUMBER
Description:Delay from time an input pin goes active until output changes

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Options:0, 1
Description:Initial condition of the gate's output

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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Buffer

Delay

Property Name:DELAY (Additional Info)
Data Type:NUMBER
Description:Delay from time an input pin goes active until output changes

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Options:0, 1
Description:Initial condition of the gate's output

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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Inverter

Delay

Property Name:DELAY (Additional Info)
Data Type:NUMBER
Description:Delay from time an input pin goes active until output changes

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Options:0, 1
Description:Initial condition of the gate's output

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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Arithmetic:

Adder | Subtracter | Multiplier | Divider | Fixed Point Divider | top

Adder

Code

Property Name:CODE
Data Type:STRING
Options:UNSIGNED, TWOS_COMPLEMENT, BINARY_OFFSET
Description:Encoding scheme for binary inputs / outputs for multi-pin I/O

Ground Ref

Property Name:GNDREF
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has a ground reference pin

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Description:Initial condition of the function's output

Initial Condition of Overflow

Property Name:IC_OFL
Data Type:STRING
Options:POS, NEG, NONE
Description:Initial condition of the overflow outputs of a device, POS means POFL high, NEG means NOFL high, and NONE means both POFL and NOFL are low

Num. Bits

Property Name:NUMBITS
Data Type:INTEGER
Description:Number of input or output bits of a device, depending on the device

Output Delay

Property Name:OUT_DELAY
Data Type:NUMBER
Description:Delay from when the input state changes until output changes

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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Subtracter

Code

Property Name:CODE
Data Type:STRING
Options:UNSIGNED, TWOS_COMPLEMENT, BINARY_OFFSET
Description:Encoding scheme for binary inputs / outputs for multi-pin I/O

Ground Ref

Property Name:GNDREF
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has a ground reference pin

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Description:Initial condition of the function's output

Initial Condition of Overflow

Property Name:IC_OFL
Data Type:STRING
Options:POS, NEG, NONE
Description:Initial condition of the overflow outputs of a device, POS means POFL high, NEG means NOFL high, and NONE means both POFL and NOFL are low

Num. Bits

Property Name:NUMBITS
Data Type:INTEGER
Description:Number of input or output bits of a device, depending on the device

Output Delay

Property Name:OUT_DELAY
Data Type:NUMBER
Description:Delay from when the input state changes until output changes

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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Multiplier

Code

Property Name:CODE
Data Type:STRING
Options:UNSIGNED, TWOS_COMPLEMENT, BINARY_OFFSET
Description:Encoding scheme for binary inputs / outputs for multi-pin I/O

Ground Ref

Property Name:GNDREF
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has a ground reference pin

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Description:Initial condition of the function's output

Num. Bits A

Property Name:NUMBITS_A
Data Type:INTEGER
Description:Number of bits for the first input of a multi-input device

Num. Bits B

Property Name:NUMBITS_B
Data Type:INTEGER
Description:Number of bits for the second input of a multi-input device

Output Delay

Property Name:OUT_DELAY
Data Type:NUMBER
Description:Delay from when the input state changes until output changes

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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Divider

Code

Property Name:CODE
Data Type:STRING
Options:UNSIGNED, TWOS_COMPLEMENT, BINARY_OFFSET
Description:Encoding scheme for binary inputs / outputs for multi-pin I/O

Ground Ref

Property Name:GNDREF
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has a ground reference pin

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Description:Initial condition of the function's output

Initial Condition of Overflow

Property Name:IC_OFL
Data Type:STRING
Options:POS, NEG, NONE
Description:Initial condition of the overflow outputs of a device, POS means POFL high, NEG means NOFL high, and NONE means both POFL and NOFL are low

Initial Condition of Remainder

Property Name:IC_REMAINDER
Data Type:NUMBER
Description:Initial condition of the remainder outputs of a divider

Num. Bits A

Property Name:NUMBITS_A
Data Type:INTEGER
Description:Number of bits for the first input of a multi-input device

Num. Bits B

Property Name:NUMBITS_B
Data Type:INTEGER
Description:Number of bits for the second input of a multi-input device

Output Delay

Property Name:OUT_DELAY
Data Type:NUMBER
Description:Delay from when the input state changes until output changes

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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Fixed Point Divider

Code

Property Name:CODE
Data Type:STRING
Options:UNSIGNED, TWOS_COMPLEMENT, BINARY_OFFSET
Description:Encoding scheme for binary inputs / outputs for multi-pin I/O

Ground Ref

Property Name:GNDREF
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has a ground reference pin

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Description:Initial condition of the function's output

Initial Condition of Overflow

Property Name:IC_OFL
Data Type:STRING
Options:POS, NEG, NONE
Description:Initial condition of the overflow outputs of a device, POS means POFL high, NEG means NOFL high, and NONE means both POFL and NOFL are low

Num. Bits A

Property Name:NUMBITS_A
Data Type:INTEGER
Description:Number of bits for the first input of a multi-input device

Num. Bits B

Property Name:NUMBITS_B
Data Type:INTEGER
Description:Number of bits for the second input of a multi-input device

Num. Bits C

Property Name:NUMBITS_C
Data Type:INTEGER
Description:Number of bits for the output of a fixed point divider

Output Delay

Property Name:OUT_DELAY
Data Type:NUMBER
Description:Delay from when the input state changes until output changes

Radix Position A

Property Name:RADIX_POS_A
Data Type:INTEGER
Description:Radix position for the first input of a fixed point divider

Radix Position B

Property Name:RADIX_POS_B
Data Type:INTEGER
Description:Radix position for the second input of a fixed point divider

Radix Position C

Property Name:RADIX_POS_C
Data Type:INTEGER
Description:Radix position for the output of a fixed point divider

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Round Mode

Property Name:ROUND_MODE
Data Type:STRING
Options:UP, DOWN, CEILING, FLOOR, HALF_UP, HALF_DOWN, HALF_EVEN
Description:Rounding mode for a digital fixed point divider

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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A to D / D to A:

Analog to Digital Converter | Analog to Digital Converter w/ Adjustable Voltage Reference | Digital to Analog Converter (Non-clocked) | top

Analog to Digital Converter

Additional documentation exists for this particular device type.

Code

Property Name:CODE
Data Type:STRING
Options:UNSIGNED, TWOS_COMPLEMENT, BINARY_OFFSET
Description:Encoding scheme for binary inputs / outputs for multi-pin I/O

Convert Time

Property Name:CONVERT_TIME
Data Type:NUMBER
Description:Time required to convert analog input to digital output

Data Ready Delay

Property Name:DATA_READY_DELAY
Data Type:NUMBER
Description:Delay from time when the output changes until the Data Ready signal is true

Enable Delay

Property Name:ENABLE_DELAY
Data Type:NUMBER
Description:Delay from time enable pin goes active until output is enabled

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Description:Initial condition of the converter's output

Initial Condition of Data Ready

Property Name:IC_DATA_READY
Data Type:STRING
Options:READY, NOT_READY
Description:Initial condition of the data ready output of a device

Initial Condition of Overflow

Property Name:IC_OFL
Data Type:STRING
Options:POS, NEG, NONE
Description:Initial condition of the overflow outputs of a device, POS means POFL high, NEG means NOFL high, and NONE means both POFL and NOFL are low

Minimum Clk Width

Property Name:MIN_CLK
Data Type:NUMBER
Description:Minimum valid clock width

Num. Bits

Property Name:NUMBITS
Data Type:INTEGER
Description:Number of input or output bits of a device, depending on the device

Offset

Property Name:OFFSET
Data Type:NUMBER
Description:Midpoint of analog input voltage range

Range

Property Name:RANGE
Data Type:NUMBER
Description:Analog input voltage range

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Sample Delay

Property Name:SAMPLE_DELAY
Data Type:NUMBER
Description:Time required to sample analog input

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Trigger Condition

Property Name:TRIG_COND
Data Type:STRING
Options:0_TO_1, 1_TO_0
Description:Determines the triggering condition of the clock pin, either the rising edge or the falling edge

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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Analog to Digital Converter w/ Adjustable Voltage Reference

Additional documentation exists for this particular device type.

Code

Property Name:CODE
Data Type:STRING
Options:UNSIGNED, TWOS_COMPLEMENT, BINARY_OFFSET
Description:Encoding scheme for binary inputs / outputs for multi-pin I/O

Convert Time

Property Name:CONVERT_TIME
Data Type:NUMBER
Description:Time required to convert analog input to digital output

Data Ready Delay

Property Name:DATA_READY_DELAY
Data Type:NUMBER
Description:Delay from time when the output changes until the Data Ready signal is true

Enable Delay

Property Name:ENABLE_DELAY
Data Type:NUMBER
Description:Delay from time enable pin goes active until output is enabled

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Description:Initial condition of the converter's output

Initial Condition of Data Ready

Property Name:IC_DATA_READY
Data Type:STRING
Options:READY, NOT_READY
Description:Initial condition of the data ready output of a device

Initial Condition of Overflow

Property Name:IC_OFL
Data Type:STRING
Options:POS, NEG, NONE
Description:Initial condition of the overflow outputs of a device, POS means POFL high, NEG means NOFL high, and NONE means both POFL and NOFL are low

Minimum Clk Width

Property Name:MIN_CLK
Data Type:NUMBER
Description:Minimum valid clock width

Num. Bits

Property Name:NUMBITS
Data Type:INTEGER
Description:Number of input or output bits of a device, depending on the device

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Sample Delay

Property Name:SAMPLE_DELAY
Data Type:NUMBER
Description:Time required to sample analog input

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Trigger Condition

Property Name:TRIG_COND
Data Type:STRING
Options:0_TO_1, 1_TO_0
Description:Determines the triggering condition of the clock pin, either the rising edge or the falling edge

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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Digital to Analog Converter (Non-clocked)

Code

Property Name:CODE
Data Type:STRING
Options:UNSIGNED, TWOS_COMPLEMENT, BINARY_OFFSET
Description:Encoding scheme for binary inputs / outputs for multi-pin I/O

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Description:Initial condition of the converter's output

Num. Bits

Property Name:NUMBITS
Data Type:INTEGER
Description:Number of input or output bits of a device, depending on the device

Delay

Property Name:OUT_DELAY
Data Type:NUMBER
Description:Delay from when the input state changes until output changes

Offset

Property Name:OUTPUT_OFFSET
Data Type:NUMBER
Description:Midpoint of analog output voltage range

Range

Property Name:OUTPUT_RANGE
Data Type:NUMBER
Description:Analog output voltage range

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

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Sources:

Digital Pulse Source | Digital Signal Source | top

Digital Pulse Source

Compl. Output

Property Name:COMP
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has a complementary output

Start Delay

Property Name:DELAY
Data Type:NUMBER
Description:Delay from time an input pin goes active until output changes

Ground Ref

Property Name:GNDREF
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has a ground reference pin

Period (0 for single pulse)

Property Name:PERIOD
Data Type:NUMBER
Description:Pulse generator oscillation period

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

Pulse Width

Property Name:WIDTH
Data Type:NUMBER
Description:Time interval between the leading edge and trailing edge of a pulse signal

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Digital Signal Source

Ground Ref

Property Name:GNDREF
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has a ground reference pin

Num. Bits

Property Name:NUMBITS
Data Type:INTEGER
Description:Number of input or output bits of a device, depending on the device

Redefine Source?

Property Name:REDEFINE_SOURCE
Data Type:BOOLEAN
Options:YES, NO
Description:If set to true, the user will be prompted to edit the function definition or to choose a new definition file, depending on the value of SOURCE_DEF

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Source Definition

Property Name:SOURCE_DEF
Data Type:STRING
Options:Dialog, File
Description:Determines whether the definition of the function comes from a dialog or an external file

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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Functions:

Asymmetric Delay | Digital Comparator | Digital Constant | Digital Lookup Table | Digital Lookup Table allowing Don't Care in Input Definition | Digital Mux | Digital Demux | top

Asymmetric Delay

Fall Delay

Property Name:FALL_DELAY
Data Type:NUMBER
Description:Delay from falling edge of the input until the output changes

Ground Ref

Property Name:GNDREF
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has a ground reference pin

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Description:Initial condition of the function's output

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Rise Delay

Property Name:RISE_DELAY
Data Type:NUMBER
Description:Delay from rising edge of input until the output changes

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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Digital Comparator

Code

Property Name:CODE
Data Type:STRING
Options:UNSIGNED, TWOS_COMPLEMENT, BINARY_OFFSET
Description:Encoding scheme for binary inputs / outputs for multi-pin I/O

Ground Ref

Property Name:GNDREF
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has a ground reference pin

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Description:Initial condition of the function's output

Num. Bits

Property Name:NUMBITS
Data Type:INTEGER
Description:Number of input or output bits of a device, depending on the device

Output Delay

Property Name:OUT_DELAY
Data Type:NUMBER
Description:Delay from when the input state changes until output changes

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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Digital Constant

Format

Property Name:FORMAT
Data Type:STRING
Options:DECIMAL, BINARY, HEX
Description:Determines the input formatting of the VALUE parameter of a digital constant

Num. Bits

Property Name:NUMBITS
Data Type:INTEGER
Description:Number of input or output bits of a device, depending on the device

Value

Property Name:VALUE
Data Type:INTEGER
Description:Output value of a digital constant

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Digital Lookup Table

Default Value

Property Name:DEFAULT
Data Type:NUMBER
Description:Default value of a digital funtion

Ground Ref

Property Name:GNDREF
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has a ground reference pin

Initial Condition

Property Name:IC
Data Type:NUMBER
Description:Initial condition of the function's output

Num. Bits In

Property Name:NUMBITS_A
Data Type:INTEGER
Description:Number of input bits for a digital lookup table

Num. Bits Out

Property Name:NUMBITS_B
Data Type:INTEGER
Description:Number of output bits for a digital lookup table

Output Delay

Property Name:OUT_DELAY
Data Type:NUMBER
Description:Delay from when the input state changes until output changes

Redefine Table?

Property Name:REDEFINE_SOURCE
Data Type:BOOLEAN
Options:YES, NO
Description:If set to true, the user will be prompted to edit the function definition or to choose a new definition file, depending on the value of SOURCE_DEF

Source Definition

Property Name:SOURCE_DEF
Data Type:STRING
Options:Dialog, File
Description:Determines whether the definition of the function comes from a dialog or an external file

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Digital Lookup Table allowing Don't Care in Input Definition

Default Value

Property Name:DEFAULT
Data Type:NUMBER
Description:Default value of a digital funtion

Ground Ref

Property Name:GNDREF
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has a ground reference pin

Initial Condition

Property Name:IC
Data Type:NUMBER
Description:Initial condition of the function's output

Num. Bits In

Property Name:NUMBITS_A
Data Type:INTEGER
Description:Number of input bits for a digital lookup table

Num. Bits Out

Property Name:NUMBITS_B
Data Type:INTEGER
Description:Number of output bits for a digital lookup table

Output Delay

Property Name:OUT_DELAY
Data Type:NUMBER
Description:Delay from when the input state changes until output changes

Redefine Table?

Property Name:REDEFINE_SOURCE
Data Type:BOOLEAN
Options:YES, NO
Description:If set to true, the user will be prompted to edit the function definition or to choose a new definition file, depending on the value of SOURCE_DEF

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Digital Mux

Ground Ref

Property Name:GNDREF
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has a ground reference pin

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Description:Initial condition of the function's output

Inversion?

Property Name:INVERSION
Data Type:STRING
Options:Y,N
Description:Determines whether or not the output reflects the actual or inverted states of the inputs

Number of Bits per Input

Property Name:NUM_BITS
Data Type:INTEGER
Description:Number of bits for a multi-bit device

Number of Inputs

Property Name:NUM_INPUTS
Data Type:INTEGER
Description:Number of inputs for a multi-input device

Delay

Property Name:OUT_DELAY
Data Type:NUMBER
Description:Delay from when the input state changes until output changes

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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Digital Demux

Ground Ref

Property Name:GNDREF
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has a ground reference pin

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Description:Initial condition of the function's output

Inactive Level

Property Name:INACTIVE_LEVEL
Data Type:INTEGER
Options:0, 1
Description:State of unselected outputs for a digital demuxer

Inversion?

Property Name:INVERSION
Data Type:STRING
Options:Y,N
Description:Determines whether or not the output reflects the actual or inverted states of the inputs

Number of Bits per Output

Property Name:NUM_BITS
Data Type:INTEGER
Description:Number of bits for a multi-bit device

Number of Outputs

Property Name:NUM_OUTPUTS
Data Type:INTEGER
Description:Number of outputs for a multi-output device

Delay

Property Name:OUT_DELAY
Data Type:NUMBER
Description:Delay from when the input state changes until output changes

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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Counters:

Up Counter | Down Counter | Up/Down Counter | top

Up Counter

Clk to Output Delay

Property Name:CLK_TO_OUT_DELAY
Data Type:NUMBER
Description:Delay from triggering edge of clock until output changes

Enable Delay

Property Name:ENABLE_DELAY
Data Type:NUMBER
Description:Delay from time enable pin goes active until output is enabled

Ground Ref

Property Name:GNDREF
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has a ground reference pin

Hold Time

Property Name:HOLD_TIME
Data Type:NUMBER
Description:Minimum time that input data signals must remain constant after triggering clock edge to register as a valid change in input state

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Description:Initial condition of the counter's output

Minimum Clk Width

Property Name:MIN_CLK
Data Type:NUMBER
Description:Minimum valid clock width

Num. Bits

Property Name:NUMBITS
Data Type:INTEGER
Description:Number of input or output bits of a device, depending on the device

Reset Delay

Property Name:RESET_DELAY
Data Type:NUMBER
Description:Delay from time reset pin goes active until output is reset

Reset Level

Property Name:RESET_LEVEL
Data Type:INTEGER
Options:0, 1
Description:Determines the reset level of a device, 1 means active high, 0 means active low

Reset To

Property Name:RESET_TO
Data Type:NUMBER
Description:Determines the value of the counter to be assigned when the reset pin goes active, assign value of -1 to ignore

Reset Type

Property Name:RESET_TYPE
Data Type:STRING
Options:SYNC, ASYNC
Description:Determines whether or not output events are synchronized with a clock event

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Setup Time

Property Name:SETUP_TIME
Data Type:NUMBER
Description:Minimum time that input data signals must remain constant before triggering clock edge to register as a valid change in input state

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Trigger Condition

Property Name:TRIG_COND
Data Type:STRING
Options:0_TO_1, 1_TO_0
Description:Determines the triggering condition of the clock pin, either the rising edge or the falling edge

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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Down Counter

Clk to Output Delay

Property Name:CLK_TO_OUT_DELAY
Data Type:NUMBER
Description:Delay from triggering edge of clock until output changes

Enable Delay

Property Name:ENABLE_DELAY
Data Type:NUMBER
Description:Delay from time enable pin goes active until output is enabled

Ground Ref

Property Name:GNDREF
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has a ground reference pin

Hold Time

Property Name:HOLD_TIME
Data Type:NUMBER
Description:Minimum time that input data signals must remain constant after triggering clock edge to register as a valid change in input state

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Description:Initial condition of the counter's output

Minimum Clk Width

Property Name:MIN_CLK
Data Type:NUMBER
Description:Minimum valid clock width

Num. Bits

Property Name:NUMBITS
Data Type:INTEGER
Description:Number of input or output bits of a device, depending on the device

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Set Delay

Property Name:SET_DELAY
Data Type:NUMBER
Description:Delay from time set pin goes active until output is set

Set Level

Property Name:SET_LEVEL
Data Type:INTEGER
Options:0, 1
Description:Determines the set level of a device, 1 means active high, 0 means active low

Set To

Property Name:SET_TO
Data Type:NUMBER
Description:Determines the value of the counter to be assigned when the set pin goes active, assign value of -1 to ignore

Set Type

Property Name:SET_TYPE
Data Type:STRING
Options:SYNC, ASYNC
Description:Determines whether or not output events are synchronized with a clock event

Setup Time

Property Name:SETUP_TIME
Data Type:NUMBER
Description:Minimum time that input data signals must remain constant before triggering clock edge to register as a valid change in input state

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Trigger Condition

Property Name:TRIG_COND
Data Type:STRING
Options:0_TO_1, 1_TO_0
Description:Determines the triggering condition of the clock pin, either the rising edge or the falling edge

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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Up/Down Counter

Clk to Output Delay

Property Name:CLK_TO_OUT_DELAY
Data Type:NUMBER
Description:Delay from triggering edge of clock until output changes

Enable Delay

Property Name:ENABLE_DELAY
Data Type:NUMBER
Description:Delay from time enable pin goes active until output is enabled

Ground Ref

Property Name:GNDREF
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has a ground reference pin

Hold Time

Property Name:HOLD_TIME
Data Type:NUMBER
Description:Minimum time that input data signals must remain constant after triggering clock edge to register as a valid change in input state

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Description:Initial condition of the counter's output

Minimum Clk Width

Property Name:MIN_CLK
Data Type:NUMBER
Description:Minimum valid clock width

Num. Bits

Property Name:NUMBITS
Data Type:INTEGER
Description:Number of input or output bits of a device, depending on the device

Reset To

Property Name:RESET_TO
Data Type:NUMBER
Description:Determines the value of the counter to be assigned when the reset pin goes active, assign value of -1 to ignore

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Set/Reset Delay

Property Name:SET_RESET_DELAY
Data Type:NUMBER
Description:Delay from time set / reset pin goes active until output is set / reset

Set/Reset Level

Property Name:SET_RESET_LEVEL
Data Type:INTEGER
Options:0, 1
Description:Determines the set / reset level of a device, 1 means active high, 0 means active low

Set/Reset Type

Property Name:SET_RESET_TYPE
Data Type:STRING
Options:SYNC, ASYNC
Description:Determines whether or not output events are synchronized with a clock event

Set To

Property Name:SET_TO
Data Type:NUMBER
Description:Determines the value of the counter to be assigned when the set pin goes active, assign value of -1 to ignore

Setup Time

Property Name:SETUP_TIME
Data Type:NUMBER
Description:Minimum time that input data signals must remain constant before triggering clock edge to register as a valid change in input state

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Trigger Condition

Property Name:TRIG_COND
Data Type:STRING
Options:0_TO_1, 1_TO_0
Description:Determines the triggering condition of the clock pin, either the rising edge or the falling edge

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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Latches:

D-Type Latch | S/R Latch | S/R Latch w/ Enable | top

D-Type Latch

Ground Ref

Property Name:GNDREF
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has a ground reference pin

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Options:0, 1
Description:Initial condition of the latch's output

Delay

Property Name:OUT_DELAY
Data Type:NUMBER
Description:Delay from when the input state changes until output changes

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Set/Reset Delay

Property Name:SET_RESET_DELAY
Data Type:NUMBER
Description:Delay from time set / reset pin goes active until output is set / reset

Set/Reset Level

Property Name:SET_RESET_LEVEL
Data Type:INTEGER
Options:0, 1
Description:Determines the set / reset level of a device, 1 means active high, 0 means active low

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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S/R Latch

S/R Dominance

Property Name:DOM
Data Type:STRING
Options:S, R, NONE
Description:Determines the dominance of a latch

Enable

Property Name:ENABLE
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has an enable pin

Ground Ref

Property Name:GNDREF
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has a ground reference pin

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Options:0, 1
Description:Initial condition of the latch's output

Delay

Property Name:OUT_DELAY
Data Type:NUMBER
Description:Delay from when the input state changes until output changes

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Set/Reset Level

Property Name:SET_RESET_LEVEL
Data Type:INTEGER
Options:0, 1
Description:Determines the set / reset level of a device, 1 means active high, 0 means active low

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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S/R Latch w/ Enable

S/R Dominance

Property Name:DOM
Data Type:STRING
Options:S, R, NONE
Description:Determines the dominance of a latch

Enable

Property Name:ENABLE
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has an enable pin

Ground Ref

Property Name:GNDREF
Data Type:STRING
Options:Y, N
Description:Determines whether or not a device has a ground reference pin

Hysteresis

Property Name:HYSTWD
Data Type:NUMBER
Description:Hysteretic-window width centered around TH (Threshold voltage)

Initial Condition

Property Name:IC
Data Type:NUMBER
Options:0, 1
Description:Initial condition of the latch's output

Delay

Property Name:OUT_DELAY
Data Type:NUMBER
Description:Delay from when the input state changes until output changes

Input Resistance

Property Name:RIN
Data Type:NUMBER
Description:Input resistance

Output Resistance

Property Name:ROUT
Data Type:NUMBER
Description:Output resistance

Set/Reset Level

Property Name:SET_RESET_LEVEL
Data Type:INTEGER
Options:0, 1
Description:Determines the set / reset level of a device, 1 means active high, 0 means active low

Threshold

Property Name:TH
Data Type:NUMBER
Description:Threshold voltage

Output High Voltage

Property Name:VOH
Data Type:NUMBER
Description:Output high voltage

Output Low Voltage

Property Name:VOL
Data Type:NUMBER
Description:Output low voltage

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Discrete Filters:

Sampling Clock Generator for Discrete Filters | Track and Hold for Discrete Filters | 1st Order Discrete Filter | 2nd Order Discrete Filter | PID Discrete Filter | Sampler and Zero Order Hold | Unit Delay | top

Sampling Clock Generator for Discrete Filters

Acquisition Time in sec.

Property Name:T_ACQ
Data Type:NUMBER
Description:Acquisition Time

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Track and Hold for Discrete Filters

Initial Condition

Property Name:IC
Data Type:NUMBER
Description:Initial condition of the filter's output

Acquisition Time in sec.

Property Name:T_ACQ
Data Type:NUMBER
Description:Acquisition Time

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1st Order Discrete Filter

Additional documentation exists for this particular device type.

D0

Property Name:D0
Data Type:STRING
Description:Denominator coefficient

Initial Condition

Property Name:IC
Data Type:NUMBER
Description:Initial condition of the filter's output

N0

Property Name:N0
Data Type:STRING
Description:Numerator coefficient

N1

Property Name:N1
Data Type:STRING
Description:Numerator coefficient

Acquisition Time in sec.

Property Name:T_ACQ
Data Type:NUMBER
Description:Acquisition Time

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2nd Order Discrete Filter

Additional documentation exists for this particular device type.

D0

Property Name:D0
Data Type:STRING
Description:Denominator coefficient

D1

Property Name:D1
Data Type:STRING
Description:Denominator coefficient

Initial Condition

Property Name:IC
Data Type:NUMBER
Description:Initial condition of the filter's output

N0

Property Name:N0
Data Type:STRING
Description:Numerator coefficient

N1

Property Name:N1
Data Type:STRING
Description:Numerator coefficient

N2

Property Name:N2
Data Type:STRING
Description:Numerator coefficient

Acquisition Time in sec.

Property Name:T_ACQ
Data Type:NUMBER
Description:Acquisition Time

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PID Discrete Filter

Additional documentation exists for this particular device type.

Derivative Method

Property Name:DERIVATIVE_METHOD
Data Type:STRING
Options:FORWARD_EULER, BACKWARD_EULER, TRAPEZOIDAL
Description:Derivative method

Pole Factor

Property Name:GAMMA
Data Type:NUMBER
Description:Pole factor for derivative

Initial Condition

Property Name:IC
Data Type:NUMBER
Description:Initial condition of the filter's output

Integration Method

Property Name:INTEGRATION_METHOD
Data Type:STRING
Options:FORWARD_EULER, BACKWARD_EULER, TRAPEZOIDAL
Description:Integration method

KD

Property Name:KD
Data Type:NUMBER
Description:Coefficient

KI

Property Name:KI
Data Type:NUMBER
Description:Coefficient

KP

Property Name:KP
Data Type:NUMBER
Description:Coefficient

Acquisition Time in sec.

Property Name:T_ACQ
Data Type:NUMBER
Description:Acquisition Time

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Sampler and Zero Order Hold

Initial Condition

Property Name:IC
Data Type:NUMBER
Description:Initial condition of the filter's output

Acquisition Time in sec.

Property Name:T_ACQ
Data Type:NUMBER
Description:Acquisition Time

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Unit Delay

Initial Condition

Property Name:IC
Data Type:NUMBER
Description:Initial condition of the filter's output

Acquisition Time in sec.

Property Name:T_ACQ
Data Type:NUMBER
Description:Acquisition Time

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Type Specific Documentation:

First-Order Discrete Filter

Device Operation:

The transfer function in the z-domain from the input I(z) to the output O(z) for the First-Order discrete filter is:

The difference equation representing this transfer function is:

For example, if N1, N0, and D0 have been set to 0, 0.1, and -0.99, respectively, the resulting first-order discrete filter will have a DC gain of 10.0, a pole located at z=0.99, and no zero.

The parameters required for the discrete filter can be found in the device documentation.

device documentation

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Second-Order Discrete Filter

Device Operation:

The transfer function in the z-domain for the Second-Order discrete filter is:

The difference equation representing this transfer function is:

A two-pole discrete filter without any zero can be achieved with N1 and N2 both set to zero. If N2 is set to zero but N1 is non-zero, a two-pole discrete filter with a single zero is realized. If N2 is non-zero, then a two-pole two-zero discrete filter is realized.

The parameters required for the discrete filter can be found in the device documentation.

device documentation

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Analog to Digital Converter

Device Operation:

This is a 1-32 bit analog to digital converter. The operation of this device is illustrated by the following diagrams:

Conversion Timing:

The ADC starts the conversion at the rising or falling edge of the clock, depending on the selected value of the Trigger Condition. The sampling of the analog input signal begins at this point. The sampling of the input is complete after an interval of Sample delay. The output data changes in response to this, Convert Time seconds after the clock trigger event. At the same time that the output initially changes, the Data ready output goes low (inactive) then high again after a delay equal to Data ready delay. It is possible to start a new conversion before the previous conversion is complete provided it is started later than Minimum clock width seconds after the previous conversion was started. Minimum clock width must always be less than Convert Time. If the Minimum clock width specification is violated, the conversion will not start.

device documentation

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Analog to Digital Converter w/ Adjustable Voltage Reference

Device Operation:

This is a 1-32 bit analog to digital converter. The operation of this device for the most part identical to the Analog to Digital Converter described above. As shown in this figure , the major difference is that the range and offset of this device is controlled by the voltage on the analog reference pin VREF.

Input Range and Offset:

This ADC has an Analog Reference that determines the Input Voltage Range and the Input Voltage Offset based on the value of the analog voltage present between the VREF and RTN pins. The voltage at the VREF pin must always be positive and greater than zero. The Input Voltage Range is equal to the voltage between the VREF and RTN pins while the Input Voltage Offset is equal to 1/2 of the Input Voltage Range.

device documentation

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PID Discrete Filter

Device Operation:

The transfer function for an analog PID filter is:

where the A in the three coefficients KPA, KIA, and KDA are used to signify that these are the coefficients associated with Eq. (1), which is defined for the analog PID filter.

Since (1) has two zeroes and one pole, there are more zeroes than poles, resulting in an improper transfer function / filter. A pole is sometimes added to the derivative term to limit the bandwidth at higher frequencies. One form for such a PID filter with a pole added for the derivative action is:

In the discrete PID filter provided, the implemented transfer function is:

where KP, KI, and KD are coefficients entered by the user. To match the frequency response of the discrete PID filter represented by (3) to the frequency response of the analog PID filter represented by (2), a first-order approximation is to set

where TSAMPLING is the sampling period. If this first-order approximation is used, the frequency response for (3) will have a very good match with the frequency response for (2), as long as the poles and zeroes of (3) are more than two decades below the sampling frequency.

The functions SI(z) and SD(z) are transfer functions in the z-domain according to the integration and derivative methods selected, respectively. The choices for the method are "Forward-Euler," "Backward-Euler," and "Trapezoidal."

The integration and the derivative methods are sometimes referred to as the mapping / transformation in the literature. Mapping and transformation are easy and simple ways to generate discrete or digital filters with frequency responses that are approximates of the frequency response of the original s-domain analog filter. The approximation is reasonable if the poles and zeros of the original analog filter are more than two decades below the sampling frequency.

Due to the nature of (3) and (5), the discrete PID filter has two poles in the z-domain, one from the integration term, and one from the derivative term. The pole from the integration term is always located at z=1 and the pole due to the derivative term is located at:

Since the location of this pole should not yield unstable responses, at the very minimum, the restraint on PD,Z is:

From (6) and (7), the restriction placed on the product YKD is:

Once the value of PD,Z is set, Y can be computed from (6). The corresponding pole location in the s-domain for the pole PD,Z in the z-domain is:

If PD,Z is set to 0.5, the corresponding pole in the s-domain would have a corner frequency of about 0.11 of the sampling frequency.

If there are already extra low-pass filter(s) along the path of feedback, it may be desirable not to introduce the extra pole associated with the derivative term in the discrete PID filter described here. While it is not exactly the same as removing the extra pole, placing PD,Z at z=0.0, the center of the origin of the complex plane, has almost the same net effect. Such a pole will have no effect on the magnitude of the derivative term, but it will introduce a phase delay to the derivative term. Such a phase delay is minimal until the signal of interest is at or above one-tenth of the sampling frequency.

If the poles and zeros of the original analog PID filter are well below the sampling frequency, then the three integration methods yield essentially the same result and the three derivative methods yield essentially the same result. The three methods were provided as a convenience if the user is using one of the three mappings or transformations as a quick way to implement a discrete PID filter when the desired analog PID transfer function has been established.

In addition, if one is using one of the three mappings, or transformations, the derivative method should be set to the same as the integration method. The two methods are allowed to be different here in case the user does not come from the point of view of mapping or transformation, but from the point of view of how to implement the integration and how to derive the derivative from the input samples.

The parameters required for the discrete filter can be found in the device documentation.

device documentation

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