MPC8377 MVREF Design

[sollong-gos]

I designed and manufactured the SBC board using the MPC8377.

Sometimes memory errors occur at low temperatures (less than -30 degrees Celsius) and the system is not booting normally and can not boot

Q) When 200 ohms is not applied to MVREF, can this cause the phenomenon?

[Bulat]

I can not know what is exact reason of your temperature issue, however the "Design checklist" (AN3665) directly states: "Each of the MVREF1 and MVREF2 supply inputs must be connected through serial resistors of 200 Ohm." We strongly recommend to follow this requirement.

Regards,

Bulat