Assuming a 20MHz clock (5MHz instruction) rate....

Setup timer 1 to count instruction cycles with a prescaler of 8. This will
result in a counting frequency of 625,000 per second.

Setup CCP1 as follows:

CCP1M = B'1011'

CCPR1H:CCPR1L = 62499

These settings will cause timer 1 to count from 0 through 62499 and then
back to zero again. On each reset, the CCP1IF flag is set. Thus you will get
exactly ten interrupts per second.

(btw: I am not sure if you need to set CCPR1H:CCPR1L to 62499 or 62500).

Bob Ammerman
RAm Systems

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