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Altera_Forum's avatar
Altera_Forum
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19 years ago

reset or not

There is a lot suggestions on how to use reset(Asyn or sync) or whether use reset. As i known,the most reason why we use reset(or set) is to force the state clearly.i.e state machine.But often in ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
19 years ago

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What does the lines below i quote in your post mean? I don't understand them clearly.

"Recovery and removal for an asynchronous reset are similar to setup and hold for a synchronous reset."

Could you explain them ?

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From the Quartus handbook, Volume 2, Section III, Chapter 8:

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Asynchronous Control Signal Recovery/Removal Analysis

This option determines whether you want the software to analyze the results of recovery and removal checks for paths that end at an asynchronous clear, preset, or load signal of a register. recovery time is the minimum length of time an asynchronous control signal, for example, clear and preset, must be stable before the active clock edge. removal

time is the minimum time an asynchronous control signal must be stable after the active clock edge. Recovery and removal requirements are similar to setup and hold time requirements, respectively.

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