Andrew Russell Morris  wrote:
>
>I recently started using the '508 and I'm having problems with the sleep
>mode. The program runs fine one time, but will not run after the chip goes
<snip>
>;      At blast time:
>;      MCLRE = EXT
>;      CP = OFF
>;      WDT = ON
>;      FOSC = INT
>
>;---------------------------------------------------------------------------
>---------------
>
>       include c:\progra~1\mplab\P12c508.inc
>
>       MOVWF     OSCCAL
>       BTFSS     STATUS,3           ;Was reset due to sleep? Skip next line
>if not
>       GOTO      STRT


        It looks like you're using the watchdog timer to wake up the chip.
If this is so, STATUS,3 will be set by the WDT (see status register
description). You may also want to look at bit 4 to see if the WDT did time
out.


        Jim Nagy
        Elm Electronics
  ICs for Experimenters
http://www.elmelectronics.com/