> Thanks. It looks like my first step should probably to reconfigure the project > so I'm using the PIC's EUSART rather than bit-banging it. >=20 > John Hansen You shouldn't have to do that.=20 Just do the following to power down: 1: Power down the MAX232 2: Set the RX pin to an output and drive it low. The only issue I can see is that the caps on the MAX232 might feed back thr= u the MAX232 and induce a voltage on the RX line coming from the MAX232 to th= e RX pin. This could result in unacceptable current on the RX pin of the PIC when you drive it low. I would just put a 3.3K resistor between the PIC's R= X pin and the MAX232 to avoid this issue (if it is indeed an issue). ~ Bob Ammerman RAm Systems --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .