gnupic: PIC18 K22 series chips
Subject:
Re: PIC18 K22 series chips
From:
Jerry Zdenek ####@####.####
Date:
28 Jan 2011 07:32:32 -0000
Message-Id: <alpine.LNX.2.00.1101280027430.20211@tantalus.sarpeidon.net>
The nominal voltage for Vpp changed from 12V for the 18F4525 to 8.5V on
the 18F45K22. I don't know if the Picstart Plus can support that. There
may be more changes as well.
Personally, I'd just get a PICkit 2 and program with that. That part is
listed as supported if you use the standalone application.
Jerry
On Thu, 27 Jan 2011, Tim Edwards wrote:
> In December, I was successfully programming a PIC18F4525 with picp and a
> Picstart Plus programmer. I was having difficulty trying to get 2 UARTs running
> at the same time, using the on-board UART for one, and software-emulating the
> other. Even at the maximum 32MHz on-board clock speed, there was just not
> enough time for the interrupt routine and everything else to run (at 38400
> baud). I thought I would try the PIC18F45K22 instead, as it has two UARTs and
> for the most part is structured rather like the 4525. I new this was not a
> supported device, but figured I could generate an entry for it in picdevrc, and
> use picsnoop if all else failed. Well, all else has failed, but so does
> picsnoop, because I found out that Microchip does not support the Picstart Plus
> with the K22 series chips. My question is: Is there something fundamentally
> different about the K22 series that makes it incompatible with the Picstart
> Plus? There's nothing in the datasheet for the K22 chips that would suggest
> that they program any differently from, say, the 18F4525. If they do program
> the same, then it may still be a shot in the dark figuring out how to make the
> Picstart Plus program it, without any support from Microchip. Any ideas?
> ---Tim
>
>
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