i use the soft is quartus10.0 , and the time is classis timing analysis . EP3C5
1 :
then i have find the ploblem ,it is that
when the pin is used for input , then i use the chip planner and find
this pin ,then cllck the pin ,and the resource property editor is
appeared , the question is this :
1) : i found the "input pin to logic arry delay 0" is used ,and the value is 6 ,
then i change the value ,but the value is no changd ,
can you tell me why it is ?
2) : can you tell me how to use the "input pin to logic arry delay
1" , because i found the "input pin to logic arry delay 1" is
graaly .
3): what is it different form. the "input pin to logic arry delay 0" to "input pin to logic arry delay 1" ;
2 : when the pin is used for output , and i click the chip planner and
the resource property editor , then i found the output property
"output pin delay " and the "output enable register tco delay" is gray .
so i have a question is
1):how to set in assignment ,then the outputpin can use the "output pin delay " or the "output enable register tco delay"
3: in assignment property , i find the setting "input delay from pin
to internal cells " and "input delay from pin to input register" , can
you tell the different form. input delay from pin to internal cells "
to "input delay from pin to input register" .
thankyou
给的回复 :
Re: the classis timing
The Resource Property Editor is used for
an ECO, whereby it can change the value directly, but it is not saved
for the next compile. It's best to do in the Assignment Editor. Put
the name of the pin in the To column, the assignment should be Input
Delay from Pin to Input Register(or Internal Cell). Then give it a
value.
The handbook for Cyclone III will give a detailed view of what the delay chains look like.
Rather than the Resource Property Editor, you can go to the Fitter
Report -> Resource Section -> Delay Chain Summary, and it will
list the post-fit settings for all I/O.
In generaly, you shouldn't ever have to set these. If you enter timing
constraints, then the fitter will set them accordingly to meet your
requirements.
答案有点失望,但是还是要谢谢altera的工作人员。