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Re: UrQ FTCU ground on the intake - What the #@$%.
> Who (which chip) handles the A/D on the digital board? Is the
> A/D in the Hitachi CPU, or is it handled by the data I/O chip
> via control from the CPU? If it's the CPU, then this would
> pretty much eliminate the 8051 idea (there are 8051 variants
> with A/D I/O, but I'm not an analog guy, so I don't want to go
The AtoD is in the D2808 chip, not the CPU. This chip also has the
counters that handle the dwell/ignition.
Some of the CPU ports are used as are the CPU timers. Have
fun with the HD6303 datasheet and an ohmmeter.
I'd prefer a Motorola CPU since the CPU bus will match that
of the HD6303... and you could probably port the MAC11 code
a _lot_ easier than to a completely different architecture.
Well, maybe when I finish the LCD units.