Hi Wouter,

Wouter van Ooijen wrote:
> What the heck is Microchip doing with the device ID's? I just checked
> the 18FXX39 ICSP specs. These four chips have device IDs that are
> identical to 4 of the 18FXX2/18FXX8 chips in the bits that Microchip
> indicates as identifying the device. Maybe these devices should be
> identified from their revision numbers only? For instance, I have an
> 18F252 that reads 0404, and an 18F2539 that reads 0407 (note: the lower
> 5 bits are the revision).

I did the same discovery a couple of months ago and I asked MicroChip.
Their answer:

> The brothers of parts which share device id's are where one of the parts
> has the motor control kernel, where the last 1000h of program memory is
> dedicated to the motor control kernel, which is accessed through the API
> calls.
>
> The motor control parts are modified variants of existing parts, with the
> addition of the motor control kernel. As a result they share device id's
> with other parts and have similar programming specifications.

Regards, Rob.

--
Rob Hamerling, Vianen, NL phone +31-347-322822
homepage: http://www.robh.nl/

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