On 05-Feb-02 Trevor Page wrote: > As for damaging the MCLR input by grounding it directly, I quote from the > datasheet: "Voltage spikes below VSS at the MCLR pin, inducing currents > greater than 80 mA, may cause latch-up. Thus, a series resistor of 50-100ohm > should be used when applying a "low" level to the MCLR pin rather than > pulling this pin directly to VSS". I think the important thing here is to look at the figures..... I can't see now a simple switch to ground and a 10K pull up to Vcc and a small capacitor are going to create voltage spikes below ground that can pump 80mA of current into the MCLR pin. Even with a several inches of wire to the switch I doubt there would be enough inductance about to cause problems. Is the MCLR input any different in this respect to other pins ? Peter ---------------------------------- E-Mail: Peter Onion Date: 05-Feb-02 Time: 09:36:42 This message was sent by XFMail ---------------------------------- -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu