[Diy_efi]

[Alexei Pavlov]

Hi Matt,

Thank you for details. So you used 2 CPU12 just to have more I/Os
and timer, isn't it ? Or do you really need computing power of both CPUs
?
What's the CPU12 clock freq ?
Is there an SPI link between both cores ?
Will CPU12 chips soldered by you (I presume TQFP packages) ?
Are you using the (almost) the same design in your other SPARKDOG
products ?


fuelogic at ihug.com.au wrote:
> 
> Hey all,
> 
> Alexei,
> 
> > For the moment no precisions have been disclosed about the
> > implementation
> 
> What u want to know...i'm happy to put up info. I put up the main program to
> the kit page...the rest once I have time to organise the pages properly.
> 
> As an overview, the kit uses two Motorola CPU12s. Each has 8 timers. Chip 1
> uses timers 1 and 2 as triggering inputs, timer 3 as the coil charge signal to
> chip2, and timers 4-8 to individually fire injectors 1 to 5.
> Having a seperate output compare timer on each injector is a good thing for
> sequential injection with pahsing control.
> 
> Chip2 has one input timer for the coil charge (and thus engine speed)
> information, four output compare timers for coil signals and three for
> injectors 5 to 8.
> 
> Each chip has 4 pwm timers as well, which can be configured to run say a
> variable intensity lamp, auto-gearbox pressure solenoid, pwm idle speed valve,
> boost control valve...whatever.
> 
> Also has two fuel pump relay drivers, a wide band sensor heater driver
> (stabilise sensor temp) and a tacho output.
> 
> Inputs are all the usual temperatures and signals, plus two extra vehicle
> speed sensors, two oxygen sensor comparators, two analog auxiliaries (each
> chip has 8 AD converters) and wide band sensor voltage.
> 
> If u wanna know more...let me know and maybe i can make a faq pdf. Cya...Matt
> 
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