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Compiler/BQ78350-R1: BQ78350-R1

Arnaud Ouandja
Prodigy 50 points
Part Number: BQ78350-R1

Tool/software: TI C/C++ Compiler

Hello,

I want to unseal the BQ78350-R1 manually with visual Studio.

1、I send cmd 0x0030 to manufactured 0x00 to seal the bq78350-R1

2、According to the BQ78350-R1 TRM  chapter 11.5.2 SEALED to UNSEALED on Page74:

Unsealing is a two-step command performed by writing the first word of the unseal key to ManufacturerAccess() (MAC), followed by the second word of the unseal key to ManufacturerAccess().

I send the 0x0414 to ManufactureAccess(0x00),then send 0x3672 to ManufactureAccess(0x00)，

I try to change the data sequence

change the sequence by 36 72 04 14

change the sequence by  72 36  14 04

None of the above is correct.

How the Unseal the BQ78350-R1

  • 0
    TI__Guru 54715 points
    Hi Arnaud,
    If you are working with a bq78350-R1 board from another developer you will need to get the key from them to unseal the device.
    If you have a new part you are using for development it will have the default key shown in the TRM.
    To unlock manually with the default key:
    Stop dashboard and register polling
    Send command 00 word 0414
    Send command 00 word 3672
    These must be sent in quick succession, use enter key to write, paste the new word and enter key again. If you are too slow like me it won't work, I find the unseal command button more reliable.