How to calculate the processor timing values?

[Priya]

coldfire2um.pdf

Hi,
I want to know how to calculate the processor timing values? ie to know how much timing is taken to execute each instructions? How to calculate this? How to calculate the latency period?

Regards,
Priya.

 

[jzo777n]

Re: Processor timing values?

Its not a easy question to answer, it depends entirely of which processor you are using.
You have to search in the datasheet/manuals for the specific processor you are interested in.
Most of the manufactures specify how many clock cycles is takes to execute an instruction.

For the Coldfire for example, you find this information in the ColdFire Core Processor User's Manual, **broken link removed**


And if you take the PIC processor, you find this text in the datasheet.

"All instructions are executed within one single instruction cycle, unless a conditional test is true or the program
counter is changed as a result of an instruction.
In this case, the execution takes two instruction cycles
with the second cycle executed as a NOP. One instruction
cycle consists of four oscillator periods."