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Problem with MCLEAR and output value

 
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Jiewy



Joined: 27 Apr 2010
Posts: 8
Location: Penang Malaysia

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Problem with MCLEAR and output value
PostPosted: Tue Aug 10, 2010 4:24 am     Reply with quote
I am trying to do a keylock using IRS.

Guys, can someone teach me how to make an output pin HIGH when the mclear of a pic is grounded?

Coz, when the mclear is high, the output is high, which is great but when i mclear the pic , the output goes to low, but i want it to remain high. So can anyone help me out?
MikeW



Joined: 15 Sep 2003
Posts: 184
Location: Warrington UK

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PostPosted: Tue Aug 10, 2010 4:47 am     Reply with quote
When you put a low on mclear, it resets the pic.

All I/O pins will float, so you will need to tie the specific pin you want high to vcc via a suitable value resistor.

When mclear is low, the PIC is not running, so how do you expect software to be able to control the pin state.

Mike
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