Em 2/8/2010 16:31, Dwayne Reid escreveu:
> At 12:35 PM 8/2/2010, Isaac Marino Bavaresco wrote:
>
>> The problem with the U(S)ARTS of most PICs is that they need the clock
>> to be running. The receiver samples the incoming signal synchronously
>> with the clock. If the clock is not running then the USART will not see
>> the signal.
> That may be the case on some PICs but does NOT appear to be the case=20
> for the 16F77.  We are currently putting the PIC to sleep (clock is=20
> stopped) and it wakes after receiving 9 clock edges fed into the TX=20
> pin (which is the synchronous slave Clock pin).
>
> The reason for this whole exercise was to avoid making a change to=20
> the existing PC board layout.  This technique does that.
>
> dwayne


If it works, great. I personally never used the 16F77.


Isaac
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