David wrote:
> On 01/07/2011 02:10, Kerry Wentworth wrote:
>  =20
>> If you use the MCLR as an input, you will need to turn VCC on and off at
>> the right time to get into programming mode. (VCC off, MCLR to VPP, VCC
>> on)  From your schematic, it does not appear that the programmer
>> controls VCC.
>>    =20
>
> Actually it could, provided the battery was not present.  The programmer=
=20
> is just a PK2 clone.
>
>  =20
Will an MCP1640 allow you to apply power to Vout while Vin is=20
unpowered?   Some regulators don't like that.
Kerry
>> Also, a 1K resistor between ground and the switch common should allow
>> programming in any switch position.
>>    =20
>
> Like Dave said, this is a very good suggestion.  Thank you.
>
> David
>  =20

--=20
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