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Sonsivri > Electronics > General Electronics (Moderators: o2, pickit2) > What uC? 20 pin pdip with xtal connected to pin 1 & 2
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Ichan
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« on: November 21, 2007, 05:43:01 17:43 »
Hi,

I'am trying to find out a microcontroller on an existing board with label scraped off, it has 20 pin in pdip package and the crystal is connected to pin 1 and 2. Anyone knows?

TIA, Ichan.
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8K51
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« Reply #1 on: November 21, 2007, 07:33:48 19:33 »
Hi

Some old 8 bits µC from Motorola(Freescale) had Xtal on 1 and 2 pins

one of them in 68HC05 family : 68HC705J1A
Here is the link for its datasheet http://www.freescale.com/files/microcontrollers/doc/data_sheet/MC68HC705J1A.pdf?pspll=1

Maybe some 68HC908 have same pinout fot oscillator
Regards
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Ichan
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« Reply #2 on: November 21, 2007, 09:22:12 21:22 »
Ah... You are my hero!

Too bad, as you said it's an obsolete one, and no PDIP 20 replacement...  Sad

Best Regards, Ichan.
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