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What is mean of reset assertion and deassertion?

Altera_Forum
Honored Contributor II
13,753 Views

When I read a textbook about FPGA design, it mentions reset assertion and deassertion. But I can't understand what the mean of assertion and deassertion. Anybody can explain them for me? 

 

Thanks very much!
2 Replies
Altera_Forum
Honored Contributor II
10,449 Views

 

--- Quote Start ---  

When I read a textbook about FPGA design, it mentions reset assertion and deassertion. But I can't understand what the mean of assertion and deassertion. Anybody can explain them for me? 

 

Thanks very much! 

--- Quote End ---  

 

 

Reset assertion is when the reset is logically 'true'; deassertion is when it is logically 'false'. The point where reset changes from 'true' to 'false' is generally important since it must be made to happen at a time that is synchronous to the clock so that those signals that use reset don't have their timing requirements violated. 

 

Kevin Jennings
Altera_Forum
Honored Contributor II
10,449 Views

Thanks very much, Kevin. You are always helpful!

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