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[MPC5748G] FCCU IO PH13/PH15

Question asked by Travis Kuo on Oct 8, 2018
Latest reply on Feb 28, 2019 by Peter Vlna

HI ,


We use MPC5738G IO PH13 and PH15 as FCCU IO.

MPC5748G PH15 (symbol MCU1_FCCU_F0) with external pull down.

MPC5748G PH13 (symbol MCU1_FCCU_F1) with external pull high.


The problem is :

When MPC5748G executes functional reset with register programming on MC_ME_MCTL, there's small period of time that pin status of PH13 and PH15 of MPC5748G resets to default. This is treated as an error of bi-stable protocol. But there's no real error happen in MCU side.


Could you please check if there's any problem with this design? Any possible solution?