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sorasit46
Joined: 07 May 2007 Posts: 69
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How to turn off MCLR (16F819) ? |
Posted: Mon Apr 23, 2018 5:03 pm |
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(Header ) #FUSES NOMCLR
I want MCLR pin (A5) can act as a regular digital input.
When low logic input, The chip will run unreliable, and will shut off on unexpectedly.
Please help.
Best regard |
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temtronic
Joined: 01 Jul 2010 Posts: 9241 Location: Greensville,Ontario
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Posted: Mon Apr 23, 2018 8:19 pm |
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You really need to show us your program, That PIC should support the fuse 'nomclr', however something else could be causing the problem you're having, like the WDT being enabled...shorted pins, ??
Jay |
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Ttelmah
Joined: 11 Mar 2010 Posts: 19537
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Posted: Tue Apr 24, 2018 12:36 am |
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Also, you have to be very careful when using the MCLR as a conventional input. It does not have any protection diode built in, and if the signal glitches above the supply (even quite a small amount), this can trigger the start of a programming cycle, and reset the chip. It is best to have your own external protection diode on the pin. |
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