12C671 - GP3 problem

[malc-c]

Not sure about the 12C chip, but on 12F series GPIO3 is the MCLR pin and what could be happening is by grounding this you are resetting the PIC - there is a way of disabling the reset function on the 12F series, so you might need to do the same on the 12C chip

[financecatalyst]

Not sure about the 12C chip, but on 12F series GPIO3 is the MCLR pin and what could be happening is by grounding this you are resetting the PIC - there is a way of disabling the reset function on the 12F series, so you might need to do the same on the 12C chip

Hi, I already have disabled the MCLR - (in Config). I also mentioned in the post above that PIC works fine when 5V supply is continues. Thanks

[mackrackit]

PIC works fine when 5V supply is continues.

What exactly do you mean?

[financecatalyst]

When I put 5V continues supply i.e. system already gets +ve & -Ve 5V and does not depend on button press for -Ve. Then lowering GP3 does result in serout data.

In other words, pic gets its 5V continues and all pins pulled high with 10K. Lowering any pin results in serout data.

[malc-c]

i.e. system already gets +ve & -Ve 5V and does not depend on button press for -Ve.

Are you applying 10V across the supply pins ? - I thought most pics will only work on 5V (ie +5v and 0V supply lines)

[financecatalyst]

No, it is 5V only. i.e. +5V & 0V.

[Acetronics2]

Hi, FC

My circuit only gets power when any button is pressed.

Reading that , ... I think you didn't show or tell us everything :

OR the code shown only is a part of ...

OR you should show the Hardware side ...

no way for us to help further not knowing what you did and how you did it ...

Alain