Help needed, crank signal generator. <solved>

[AngelMarc]

Looks like plenty of head room.

[MPC001]

Looks like plenty of head room.

Thanks for sharing

[MPC001]

Looks like plenty of head room.

Seems via 68377 spec (E40 MPU) that max current per pin is 1mA. Total 20mA all pins. 33uA sink measured for each of crk & cam inputs resonates with this. All pins max 5V. (Some are 3.3V).

It's a sensitive little number cruncher. Not much margin in an electrically noisy engine bay. Maybe why the MPC56x series superceded so effectively with a 10+ year reign.

[MPC001]

Now to see how stable a 600Mhz Teensy 4.0 can do these waveforms.

Teensy 4.0 at 150Mhz through 600Mhz up to over 800Mhz, the jitter remained at circa +/- 35rpm . So as I think Antus may have mentioned, not due to lack of clock/power. Maybe an artifact of the 68377 being such a busy beaver doing all that factory code crunching, or IDE abstraction code?