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PIC16F88 issue as it freezes when pins are touched

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b4bb4ge

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Hello,

I am running a system on a PIC16F88 and a PIC18F4620.

My program runs very smoothly but as soon as I touch pins on either of the processors the processors will freeze up.

Has any one seen this before I can make this happen consistently, even with an anti-static band on.

As soon as I re-power the processors they run just fine until touched again.

Does anyone have a solution to this?

thanks,
B4BB4GE
 

pic16f88 pull up

Check the MCLR pin if was always pull-up to 5V.

I have be encounter this strage behaivor when in the sw I put MCRLEN and I forgot to pull-up the MCLR pin externally.
 

Re: PIC16F88 debug issue

I have similar behavior with 16F628. I programed them to use internal pull up on MCLR, everything is working OK exept when I put my finger close to PIC.

I solve problem with 1kOhm from MCLR pin to V+.

After that everything working nice.


Mr.Cube
 

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