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*Tom*
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| using RA4 and RA5 as I/O pins |
 Posted: Fri Jun 08, 2007 1:41 pm |
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Hi, I'm using the PIC16F648A and trying to use all the pins (port a and port b) as outputs, but RA4 and RA5 don't work.
I think its probably because I've set the wrong fuses somewhere, so I was hoping someone can tell me what I've done wrong.
I'm not sure about RA4 but I'd expect RA5 to work since I'm using NOMCLR
Here is what I have up untill the main program
| Code: |
#include<16F648A.h>
#fuses NOWDT, PUT, NOPROTECT, NOBROWNOUT, NOMCLR, NOLVP, INTRC_IO, NOCPD
#use delay(clock=4000000)
struct pins{
int8 a:8;
int8 b:8;
}port, dir;
#BYTE port = 0x05
#BYTE dir = 0x85
dir.a = 0;
dir.b = 0;
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I've tried it on more than one PIC so I know its not just a faulty chip
PCWH Compiler
IDE Version 3.40
PCB Version 3.180
PCM Version 3.180
PCH Version 3.180
Thanks for any help |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Fri Jun 08, 2007 1:59 pm |
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| Quote: |
I'm using the PIC16F648A and trying to use all the pins (port a and
port b) as outputs, but RA4 and RA5 don't work. |
See this thread:
http://www.ccsinfo.com/forum/viewtopic.php?t=24661&start=37
Also, look in Table 3-2, Pinout Description, in the 16F648A data sheet.
It describes what each pin can do (including limitations). |
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