I have learned from this list that I should read the OSCAL from a EPROM
PIC before first use. I was wondering if anyone out there could post
instructions on how to do so. The more detail the better. I have a
12c508 and ePIC from MELabs as my programer. Thanks.
I don't know for ePIC from MELabs but read the PIC code and look
at the 0x1FF address. It has something like "0C80". The last two hex
digits (80) is the OscCal Value since movlw 0x80 yelds 0C80 in code.
"Beardsley, Alec" wrote:
> I have learned from this list that I should read the OSCAL from a EPROM
> PIC before first use. I was wondering if anyone out there could post
> instructions on how to do so. The more detail the better. I have a
> 12c508 and ePIC from MELabs as my programer. Thanks.
> Alec Beardsley
I want to program pic12C671's and 12C672's, but im not sure what this
is all about.
Please someone explain and show me what I have to do with OSCAL for JW
OTP part programming.
On Tue, Jan 18, 2000 at 04:12:12PM -0500, Darren Logan wrote:
> Please someone explain and show me what I have to do with OSCAL for JW
> and OTP part programming.
Before erasing the JW parts, read them with your programmer, find and
save the OSCCAL value. Mark it on the chip, or something like it.
(I use a liquid paper dot code on my JW's and have an index page in the
storage box with the OSCCAL for each)
Before programming the JW parts, include the OSCCAL instruction using
your assembler. The instruction you use should match the chip. This
is so your JW part runs at the right speed.
Before programming the OTP parts, REMOVE that OSCCAL instruction,
because the OTP parts already have it programmed. This is so your OTP
part runs at the right speed.
You do not need to worry about it if you are certain you will never use
the internal oscillator. I think.
James Cameron us.netrek.org quozlhttp://quozl.us.netrek.org/
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