VR5510 cannot enter INIT_FS

[QR]

The board enter debug mode after power up, value of FS_OVUVREG_STATUS is 0x5550, then write 1 to clear the flag, the value of FS_OVUVREG_STATUS keeps 0, and RSTB output high, the FS0B output low,and then make the device go to INIT_FS by setting GO_TO_INITFS (bit10 of FS_SAFE_IOS), then get FS_STATES,the FSM_STATES(FS_STATES[4:0]) always is 0x05, but there is not any information about 0x05. how to get the VR5510 to enter the INITFS?

[guoweisun]

1:FS_OVUVREG as 0x5550 mean VCORE and VDDIO have UV error,you need eliminate them firstly then to power on.

2:You can see below flow chart,after LBIST/ABISL1 no more issue,it will automatically enter into INIT phase.

[QR]

UV flags cleared only one time, the flags keeped 0, and UV flags have not been setting again. FS_DIAG_SAFETY is 0x040f, LBIST and ABIST always ok.
is the cause is the UV error?

[guoweisun]

You should double check the UV error on VCORE and VDDIO.

Then RSTB assert to high,FS0B assert high?

what do you mean FSM_STATES(FS_STATES[4:0]) always is 0x05? can you double check it again?

[QR]

VCORE is 1.807v, VDDIO is 3.287v. it is ok.
RSTB assert to high,FS0B assert low.

 I'm sure that FSM_STATES(FS_STATES[4:0]) always is 0x05

Does the status of FS0B prevent the device from entering INIT_FS?

[guoweisun]

After pass the LBIST and ABISL1,the SBC enter into INIT phase automatically which mean no need send the register of GOTO_INITFS bit.

[QR]

thank you.

I try to get the FS_STATES without writting GO_TO_INIT, it didn't work. the state is still 0x05.

[guoweisun]

what about don't enter into debug mode only normal operation?

[QR]

the same with the last case,it didn't work, the state is 0x05.

[guoweisun]

你有换过板子测试吗？你的芯片是QM还是ASILB or D是哪个芯片？

[QR]

上面调试用的是MVR5510AMDALES，是ASIL D的，板子是硬件画的，换过板子，读到的数据是一样的。
刚才用开发板试了下，读到的状态是正常的，开发板使用的型号是MVR5510AMDAHES，也是ASIL D的。

[guoweisun]

首先你看看板子硬件电路跟EVM 的区别。MVR5510AMDALE BUCk1/2 是single phase，MVR5510AMDAHES BUCK1/2是dual phase

[QR]

不好意思，之前错看成S32G-VNP-RDB2的原理图导致认为使用的VR5510型号不一致，实际使用的S32G-VNP-RDB3开发板，开发板原理图上标的型号是 PVR5510AMDALES ,实际应该是 MVR5510AMDALES ，这样的话我手上的板子与开发板使用的型号是一致的，我这边再排查看看，感谢！

[QR]

我手上的板子关于BUCK1/2这块的硬件连接与开发板一致，看到可以通过OTP更改这块的配置，我现在尝试把它改为dual phase看看，谢谢！