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BQ27742-G1: Accessing Data Flash

Part Number: BQ27742-G1
Other Parts Discussed in Thread: BQSTUDIO, EV2400

Hi team,

Customer is having difficulty accessing the data flash. 

Writing 0x00 to the BlockDataControl() (0x61) register always failed, which led to unseal the device first. Procedure for unsealing the device does not seem straightforward and even after writing the unseal key 0x8000 to the control command as mentioned in the spec, data flash access seemed to fail. CONTROL_STATUS always shows the device is in FULL ACCESS mode. 


Do you have any examples to unseal the device and to read data flash block offset with success?