I am trying to avoid the sleep mode on the PIC16C5X to avoid extra external harware and the 18ms wake up period. (In my design it causes a problem). I decided to use a two speed RC oscillator. How low of a frequency can I operate the PIC to simulate a sleep mode? Can I operate down to 1KHz with 3V for example to achieve comparable power reduction to sleep mode? I would appreciate some advice. Thanks Neil Gandler