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Altera_Forum
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15 years ago

timescale setting in Altera library model

1ps/1ps is used as timescale in Altera's simulation model, normally we use 1ns/1ps as timescale. Now if 1ps/1ps is used as timescale, the simulation process will slower down at least by 100 times. ...
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Altera_Forum
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15 years ago

Not sure what you say is true.

The first parameter refers to the time unit of your delay values.

The precision, and hence the speed of the simulation, is possibly related to the second value.

However, also the second value should only refer to the precision of the calculated values.

As example if 1ns/1ps and you have period = 3 and calculate frac=period/3

you get period=9ns and frac= 333ps

As example if 1ns/10ps and you have period = 3 and calculate frac=period/3

you get period=9ns and frac= 330ps