GM PCM OBD-II HW registers

[Ara Bedrossian]

Yes motorola does have an J1850-to-SPI and it's on their website..

its the 68hc68


Ara

----- Original Message -----
From: "David Cooley" <n5xmt at bellsouth.net>
> GM has been Motorola Based for the most part.  I would suspect, that they
> have used a one off proprietary piece, since Motorola doesn't list any
data
> on their site for HC11 based J1850 controllers.  They list HC16, HC32 and
> HC05 based units, and I have heard they have a stand-alone chip that does
> J1850 to SPI (though not listed on their site or available to the
public...)