Hi all,
Is there anyway that a PIC in sleep mode can wake-up periodically by way of an internal mechanism (say, every 30 seconds), perform a short routine and then re-enter Sleep again?
I'm using a 16F505, but this has no interrupts so I was wondering if I could use the internal timer to implement this function? I know the wake-up on input change would suit but this would mean adding an external timer and the loss of an I/O pin.
If this is not possible with the 505, is it possible with any other PIC and if so, do I still have to externally generate an interrupt every 30 seconds?
Thanks for any help, Simon