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Original question:

BQ78350-R1: How to unseal the BQ78350-R1 with Advacnced Comm SMB in the BQstudio

BQ78350-R1: Unseal bq78350-r2 has problem !

frank tsai
Intellectual 435 points
Part Number: BQ78350-R1
Other Parts Discussed in Thread: BQSTUDIO,

I have same problem as the thread 

https://e2e.ti.com/support/power-management/f/196/t/590548?BQ78350-R1-How-to-unseal-the-BQ78350-R1-with-Advacnced-Comm-SMB-in-the-BQstudio

We has project use bq78350-r2 communicate with external MCU and  want manual unseal bq78350-R2 through the Advanced comm SMB in bqStudio but never success.

The UNSEAL buttom show the key is 0x36720414 , so I seal it by write 0x0030 to ManuFactureAccess (0x00) , then Write 0x3672 and 0x0414 to ManuFactureAccess (0x00)

but still in sealed , I tried different combination still fail, Could help give correct process to unseal chip ? I also try to read the unseal keys by manually, write 0x0035 to  ManuFactureAccess (0x00)

then read it through read ManuFactureData (0x23) but got 07 02 00 00 not the key show by the UNSEAL button, why ?

please help as soon as possible, thanks