I need to identify two 42 pin chips in the ECU of my vehicle but these =
are custom numbered. All I know is that a 4.19MHz crystal is connected =
to pins 15/16 of one and pins 16/17 of the other.

I initially thought they were 8031/51 but these are 40 pin chips right?

Can someone help.

Thanks in advance

Nikhil

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