This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C3467B.670294D0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Olin Lathrop wrote: > I think the purpose of the diode is to prevent current being > dumped onto the Vdd supply during high voltage programming. > If the rest of the circuit always draws more then 800uA from > the Vdd supply, then you can connect a 10Kohm resistor from > Vdd to MCLR and ignore the diode. If you wrote about diode D on attached scheme, then it's purpose is described clearly in item 1 of the text below the scheme. Mike. -- http://www.piclist.com#nomail Going offline? 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