Problem with porta.5 on pic 16f873A
I try many changes but i can't give high on porta.5 pin.all other pins are working as digital but porta.5 don't work.what i miss here can anyone help me?
I am using pic pasic pro ver 2.47 and my code is the following:
"
define osc 20
ADCON1=7
CMCON=7
TRISA=0
PORTA=0
TRISB=0
PORTB=0
SSPCON=0
porta.0=1
porta.1=1
porta.2=1
porta.3=1
porta.4=1
porta.5=1
end
"
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Without looking at the data sheet, my first guess would be that it has an open collector output and needs a pullup resistor as the result . . .Gotta love those data sheets.
Edit: Nope portA.4 is open drain. A.5 appears to be a standard I/O, maybe your PIC is damaged, maybe your breadboard is bad. Check the pin with your voltmeter directly on the pin itself.<br> http://www.kirlian-photography.com/video/PIC16F87XA.pdf
Last edited by Archangel; - 18th March 2008 at 16:35.
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Hi,
Could it be a short circuit between PortA.5 and Vss ... the next pin ???
just an idea ... and a very good reason not to reach "1" state !!!
Alain
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You are correct.I find the problem.I was short circuit between porta.5 and gnd from breadboard .the good is that pin is steel working.thanks acetronics and joe.s for your help.
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