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what is the pic i/o speed with crystal relation?

 
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pcmguy



Joined: 24 Oct 2005
Posts: 5

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what is the pic i/o speed with crystal relation?
PostPosted: Fri Apr 28, 2006 8:10 pm     Reply with quote
Hi all,

Can anyone tell me:

1. how to calculate max i/o speed of a pic?

2. what is the relation between pic crystal speed and max i/o speed?
e.g. if i use a pic16f84-04 and pic16f84-20, what is the different max i/o speed between them?

thanks!

yours pcmguy,
Mark



Joined: 07 Sep 2003
Posts: 2838
Location: Atlanta, GA

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PostPosted: Fri Apr 28, 2006 8:41 pm     Reply with quote
Most instructions are single cyle. The cycle time is 1/4 the operating frequency. At 20MHz the operating speed is 5 times that of 4MHz.
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