Re: PIC18 K22 series chips

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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