'PIC 16C64 Problem'
I am currently having a problem with a PIC 16C64,
so Jaap van Ganswijk gave me the idea of posting
it to this list...
I already have some expirience with PIC 16C5x devices,
but for this particular application (a RS232 control
pannel), I needed some more I/O pins. So I chose the '64.
I am using a Parallax PIC16Cxx programmer and a homemade
40 pin ZIF adapter for the '64.
The adapter seems to work ok, since I am able te write,
read and verrify the PIC. I use PASMX as assembler.
But the PIC wont do a thing... even if all i try is
putting a byte on one of the I/O ports...
I did notice a lot has changed on this edition of
the pic... (no more MOV !RA,#?? instruction, the realocation
of the reset vector, and the addition of a a GND and VCC pin)
(Why does the pic needs 2 power pins ? do I have to connect
I try'd to run the device (a JW version) on a 20 MHz osscilator,
and on a 4 MHz ceramic resonator.
But it just sits there and does nothing...
I do not know if my problem is soft- or hardware-related, since
I was unable to get any (known working) source code examples,
written in parallax assembler, for the PIC16c64.
Any tips are more then welcome, as is a source example or
simple hardware schematic.
Anil K. Patel
On Tuesday, October 17, 1995 2:38 PM, Hans Ameel [SMTP:PING.BE] Hans.Ameel
It wouldn't surprise me if you need to connect both power and ground pins.
I had a 68HC11 project where I used a pin that had multiple power and ground
pins. I forgot to connect one of the power pins and it took me a long time
to figure out why I couldn't read from the on-board A/D. Then I hooked up
that extra power pin and voila, A/D worked fine.
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