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Proteus question - problem with port settings of pic 16f84

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cb30

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Proteus question

In pic 16f84. Because PORTA,4 can't set pin to high level? Is this a bug or it is normal?
 

S

sick_man

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this is normal
pin a.4 is an init pin for severl special function registers

so i dont think the config and functions register
has pull ups portb only i think on 84 {not sure}
look in the data sheet
just need too set up the code or better is use a 220R res ad a 10k to + too give pull up

carefull n code ...
 

sc/mp

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Hi

According to datasheet PINA4 is OPEN DRAIN output pin
or Schmitt trigger input pin.

Place some pull up if you want high level.

Regards
 

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