BQ76PL455A-Q1: BQ76PL455A-Q1， device fault， MASK_DEV register failed

Hello Jun,

When you set MASK_COMM, _SYS, _DEV, it will not clear an already set fault flag, you should reset them then.

MASK_DEV is used to mask internal register checksum fault, what's "device fault" that you still observed?

And how do you observe this fault? by NFAULT pin?

Maybe there is another fault not dev fault which triggered corresponding fault bit and NFAULT line.

Thanks!

Andy

Hello Andy,

1, we have reset them,

2, we observe this fault by reading the fault register, so we can acquire the fault type.

Best Regards!

Jun

Hello Jun,

What "device fault" do you get?

Andy

Hello Andy,

we read this register:

7.6.3.30 FAULT_SUM 0x52–53 (82–83) Fault Summary
[15] UV_FAULT_SUM
[14] OV_FAULT_SUM
[13] AUXUV_FAULT_SUM
[12] AUXOV_FAULT_SUM
[11] CMPUV_FAULT_SUM
[10] CMPOV_FAULT_SUM
[9] COMM_FAULT_SUM
[8] SYS_FAULT_SUM
[7] CHIP_FAULT_SUM
[6] GPI_FAULT_SUM
[5:0] RSVD Reserved — always read as zero.

we acquire the fault is [7] CHIP_FAULT_SUM

Best Regards!

Jun

Hello Jun,

I will give comments by tomorrow.

Thanks!

Andy