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Pic input/output pins
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Topic: Pic input/output pins (Read 2748 times)
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Zedy
Contributor
Posts: 26
Pic input/output pins
«
on:
June 24, 2010, 11:56:58 am »
hi!
Just started a project, and have some question, if I make TRISC ('b'00001111), and try to write(for example):
movlw 0xFF
mowf PORTC
what will happen? will the input pins ignore this, because they are inputs?
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Strube09
Regular Contributor
Posts: 125
Country:
Re: Pic input/output pins
«
Reply #1 on:
June 24, 2010, 03:08:24 pm »
For PIC, when you set the pin as an input you disable the output driver for that pin. So writing to the port(x) pin will not affect the pin.
However I do believe that if you change the pin back to an output it will then display whatever your last write to the port(x) register was. So be sure to set the pins to a default or safe position before enabling any pin as an output.
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Zedy
Contributor
Posts: 26
Re: Pic input/output pins
«
Reply #2 on:
June 24, 2010, 06:54:07 pm »
Thanks for help
about pull-up -> referring to datasheet OPTION Register controls pull-ups
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