How to make PMIC as NORMAL_FS?

[harry_choi]

Hello Community,

I would like to make QM grade PMIC(VR5510) to NORMAL_FS.

I already succeeded to make ASIL-D grade PMIC to NORAL_FS by following VR5510 reference manual.

But I don't know how to make NORMAL FS on QM grade VR5510.

It still stayed in INIT-FS even though set same as ASIL-D grade VR5510.

Thanks,

Harry

[guoweisun]

So you don't know how to enter into normal mode, right?

[harry_choi]

I could made normal state on VR5510 ASIL-D grade.

But it wan not changed INIT_FS state with same way on QM grade VR5510.

[guoweisun]

Can you explain more for --- it wan not changed INIT_FS state with same way on QM grade VR5510?

[harry_choi]

For the ASIL-D grade VR5510, I could make NORMAL_FS by following below step:

1. Write goot watchdig

2. Run ABIST2

3. Make FLT_ERR_CNT=0

4. Release FS0B

5. Then FSM_STATES in FS_STATES register changed to NORMAL_FS. 

But the QM-grade VR5510 doesn't support ABIST2 and FS0B. 

So, I just write goot watchdog to exit from INIT_FS. 

When I did above 1~4 steps on QM-grade VR5510, there wass no state change.

Thanks,

Harry

[guoweisun]

QM version means operate as non-safety part.

[harry_choi]

Yes, correct.

[guoweisun]

So you question is: how to do for enter into Normal mode by QM version, right?

[harry_choi]

Yes, when I read the FS_STATE register, I want to get NORMAL_FS state on QM VR5510.

[guoweisun · Accepted solution]

For QM version VR5510 , it can not enter Normal_FS state as FS0B can not released on QM version device.

[harry_choi]

Thanks for clarification. 

Harry