Mike.T wrote:
>I am having trouble getting timer1 to act as an asynchronous counter. I am
>using a PIC16F628 and according to the microchip spec, I should be able to
>use pin RB7/T1OSI as an input pin for the counter. The pin is receiving a
>square wave signal between 13Khz and 15Khz of 0V to 5V.
>

Hi, Mike, I have not tried that particular chip, but fig 7-1 of the
datasheet indicates that pin RB6 is the external input to Timer1,
not RB7.

I use Timer1 for external counting all the time on other members of
the family - '73/76/876/. It will go to over 50 mhz, with the prescaler
enabled, much faster than what the "specs" would seem to indicate.
[I am ducking now ;-)]

hope this helps,
- dan michaels
www.oricomtech.com
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