16f628a porta.5 as input

[naga]

HI ALL,
Using portb as output : working well.
Using porta.0 to 7 except porta.4 & 5 as input with pull-up resistor working well with 0v trigger, Can i use also a pull-up resistor to porta.4 &5? or do i need to use pull-down resistor then trigger with +5v input.. Looking for help before messing up my IC.( didn't try yet,)
Thanks.

[Max Power]

you should be able to wire the resistor as a pullup or pulldown depending on what your input signal is.

[Acetronics2]

Hi, Naga

you can always use pullup or pulldown with inputs ...

But take care to PORTA.4 and 5 ... They're not protected against voltage over VDD !!! ( see Datasheet p 33 ...)

Alain

[naga]

Thanks to all, Is there any way that can porta.5 be used as output?..Thanx again.

[Acetronics2]

Hi,

The only way is to use it as output is as an OPEN Collector output ...

Alain