>-----Original Message-----
>From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] 
>On Behalf Of Xiaofan Chen
>Sent: 24 April 2007 15:41
>To: Microcontroller discussion list - Public.
>Subject: Re: [PIC] Pro programer/head in dark place troubles
>
>
>
>Actually the datasheet for 16F72 and 16F7x7 show 0.1uF 
>capacitor. Therefore it is really a very common practise to 
>put a bypass capacitor to Vpp.
>

Not if you want to support ICSP.  We has MCLR bypassed like this in one of our first designs and it was virtualy impossible to program unless the capacitor was removed, and this was using Microchips own production programming solution.

Regards

Mike

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