sleep mode question

SLEEP

Yes on the RB0 INT, but not on RA0.

Carefully read the datasheet on this stuff, it really matters. You have to have INTE set to have it wake from SLEEP on the RB0 interrupt. GIE will determine what happens after wakeup (next instruction or branch to ISR). The instruction following sleep gets executed before anything else. READ THE DATASHEET. :-)

BTW, you should be using something like a 16F88. It's basically pin compatible, much cheaper and has way more features.

Thanks for the help

You can also use the other pins on PORTB to wake up from SLEEP by using the "interrupt on change" feature. In fact, that's the only time you can rely on the IOC functionality to not miss any input pin state changes.

"Hayley" wrote

Microchip has several application notes with code examples to help you get started.

AN528 Implementing Wake-Up on Keystroke

AN879 Using the Microchip Ultra Low-power Wake-up Module

This is for the PIC16F684, but you can use a similar approach with any PIC supporting wake-up on pin change.

Regards,

-Bruce