watchdog, sleep & overflow @ pic16f628a

Hi guys:

I have a doubt about the watchdog functionality.

Let's say that I have the watchdog enabled, then during the program I use the instruction sleep and then the instruction nop.

My question is : where does the program continuw after a watchdog interrupt?

to the nop instruction or to the program address 0000h?
what's the correct way to use the watchdog?

t.i.a.

If the PIC is sleeping, due to executing the SLEEP instruction, then the watchdog timeout event will cause the PIC to resume executing with the instruction following the NOP.

If the PIC is just executing normal instructions (not sleeping) then it will be reset and start executing instructions at 0000h.

is the data ram cleared in both cases?

ram is usually retained during resets and sleep modes. Read the PDF for your PIC, it will tell you the startup conditions of every power up mode.

ok then. Thank you kchriste & Sceadwian