problem with Watchdog in Lite29

czubak_p · ‎2003-10-24

Posted on October 24, 2003 at 10:42

czubak_p · ‎2003-10-18

Posted on October 18, 2003 at 11:39

I have a problem with watchdog in Lite29:

1. When it is configured as software in option byte, and when I turn it on (bit WDGA = 1 in WDGCR register) and do not refresh the counter, it doesn't reset the mcu.

2. When it is configured as hardware in option byte it resets the mcu every time (every 2ms) and refresh the counter register WDGCR doesn't have an effect.

It looks like the write to the WDGCR register doesn't work.

(Address is correct and is 002Eh).

czubak_p · ‎2003-10-24

Posted on October 24, 2003 at 10:42

Problem solved

if we work with crystal rezonator, and we set in option byte

RC oscillator = disabled

PLL32OFF = disabled

PLLOFF = disabled

then we must set

PLLx4x8 = x8

then Watchdog work correct

when this option is set x4 then Watchdog is not working