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ICD-U40: 47k on MCLR?

 
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rooney



Joined: 28 Aug 2004
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ICD-U40: 47k on MCLR?
PostPosted: Tue Feb 21, 2006 12:59 am     Reply with quote
I've to confess I'm not the best hardware engineer so I'm a little bit confused what for the 47k resistor on MCLR is required. Well I know that it is used for pulling up the signal zu VDD (5V) but during the programming process it will be pulled to 13V. In my application VDD of the controller is not isolated during programming, so other ICs are all connected to VDD, any time.
If the PIC is in programming state, what will happen to my 5V supply? Will my ICs be shortly powered by 13V?
PCM programmer



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PostPosted: Tue Feb 21, 2006 1:29 am     Reply with quote
See this thread:
http://www.ccsinfo.com/forum/viewtopic.php?t=22532
rooney



Joined: 28 Aug 2004
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PostPosted: Wed Feb 22, 2006 12:03 am     Reply with quote
Thanks a lot, question fully answered.
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