This page contains information about the ICs (chips) used in GM/Delco ECMs.

Part numberDescription
16079434,
16034980,
16069564,
16139860		 Custom microcontroller, based on 6811. Contains RAM, SCI and SPI, 11 I/O bits, COP watchdog timer, and periodic interrupt timer.
45148 Custom timer chip, something like the TPU in the 68332
34988 A/D converter. Interfaced via the SPI port. This is a standard NSC, TI, etc. part
54995 Custom limp home fuel controller chip.
34987 O2 sensor amplifier. Standard NSC part
16034984,
16052444,
16079435 		Custom misc. SPI I/O port, EST interface, P&H injector driver controller, some random signal buffers
34993 custom IAC driver
16042368
16045580
34992 Power supply
16045980 Quad driver
40669
45152

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