On 17/04/2011 22:20, Josh Koffman wrote:
> Funnily enough, there is an 18F part that does it. The 18F4550 and the
> 18F4455 both do it. I had a discussion with one of the Microchip
> Training guys about that, and he didn't realize there was an 18F part
> that did it either. The part I don't get it is that you have to
> program the chip to enable the secondary port...using the original
> port. So unless you preprogram the chip out of circuit, or have two
> ICSP ports on your board, you can't really use the second port easily.

Doh! I have both an 18F4550 and 18F4455 here, but it's been a while=20
since I used either - typical.. :-)
With the enabling of the secondary port - IIRC the programming is=20
actually available on either straight away, just the debug port needs to=20
be set in the config bits. This means you can set it up however you=20
want, and only use one port. The first time you program, you enable the=20
port for debug (if it's not the default one)
At least this is the way I remember it on the PIC32.


--=20
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