Author Topic: Pic input/output pins  (Read 2054 times)

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Offline Zedy

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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?
 

Offline Strube09

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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.
 

Offline Zedy

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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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