I have a bunch of motorola XC68705P2S ( 28 pin cerdip quartz window)
I read a brief datasheet about 6804 but till now haven't found a complete
datasheet with a programming indication or schematic.
XC parts were Motorola's engineering samples. The datasheet for
the production parts would be under the same number with MC instead
of XC.
What sort of date code? A lot of those old NMOS parts make good room
heaters, but not much else. ;-). Kind of hard to make a good portable
project when the microprocessor takes 100 mA, (like the MC68705P3 does).
Dig, dig, dig. Damn, I have some stuff for that chip. The data for the
'704P2 is on the MC6804J1 etc. datasheet, numbered ADI1248, order number
MC6804J1/D, dated 1986. I also have the M6804 MCU Manual, order number
DLE404/D, circa 1985.
This was their cheap chip for large volume low performance applications,
so support was a lot less than for the 6805 chips. They are bit serial
internally so a byte cycle take 12 bus clocks (oscillator divided by 4,
2 or 1), and up to 5 byte cycles per instruction. Looks like the '704P2
takes 160-250 milliwatts, ie. about 40 mA.
If you can't find it on the web, I can scan it, but it make take a
while as it's about a 1 cm stack of stuff.
Mark Zenier
[email protected]
Googleproofaddress(account:mzenier provider:eskimo domain:com)
