Set: SynopsisLibertyUserGuideVol1 - 2

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All 12 Terms

Term Definition
Fall delay The time it takes for the output signal voltage to fall to output_threshold_pct_fall after the input signal voltage has fallen to input_threshold_pct_fall.
Rise delay The time it takes for the output signal to rise to the threshold point set with the output_threshold_pct_rise attribute after the input signal has risen to input_threshold_pct_rise.
Slew The time it takes for the voltage value to fall or rise between two designated threshold points on an input, output or inout.
slew_lower_threshold_pct_fall : value; The attribute used to set the value of the lower threshold point used in modeling the delay of a pin falling from 1 to 0.
slew_upper_threshold_pct_fall : value; The attribute used to set the value of the upper threshold point used to model the delay of a pin rising from 0 to 1.
slew_lower_threshold_pct_rise : value; The attribute used to set the value of the lower threshold point used to model the delay of a pin rising from 0 to 1.
slew_upper_threshold_pct_rise : value; The attribute used to set the value of the upper threshold point used to model the delay of a pin rising from 0 to 1.
slew_derate_from_library : value; The attribute used to specify how the transition times found in the library need to be derated to match the transition times between the characterisation trip points.
input_threshold_pct_fall : value; The attribute used to set the value of the threshold point on an input pin signal falling from 1 to 0, which is used in modelling the delay of a signal transmitting from an input pin to an output pin.
input_threshold_pct_rise : value; The attribute used to set the value of the threshold point on an input pin signal rising from 0 to 1, which is used in modeling the delay of a signal transmitting from an input pin to an output pin.
output_threshold_pct_fall : value; The attribute used to set the value of the threshold point on an output signal falling from 1 to 0, which is used in modeling the delay of a signal transmitting from an input pin to an output pin.
output_threshold_pct_rise : value; The attribute used to set the value of the threshold point on an output signal rising from 0 to 1, which is used in the modeling of a signal transmitting from an input pin to an output pin.

Set Information

Terms 12
Creator hugoleeney
Created March 13, 2007
Groups None
Subjects None
Access Anyone
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Description

Delay & slew attributes - used to set the values of the input and output pin threshold points used to model delay and slew.

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