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Read/Write to data flash command for BQ20851

Misha Krasnorutsky
Prodigy 20 points
Other Parts Discussed in Thread: BQ2083

I see All the SMBus commands for manipulating registers in the documentation:

https://www.ti.com/lit/ds/symlink/bq2085-v1p3.pdf

But I can't figure out where to find the commands to read/write data flash memory. Please help.

  • 0
    Prodigy 20 points

    Found the working solution in the document for bq2083:

    Read

    Reading the data flash is a two step process:

    1. Using the SMBus write word protocol, use command code 0x51 and let the LSB data byte be the address of the flash location. The MSB data byte is set to 0.

    2. Using the SMBus read word protocol, use command code 0x52 to retrieve the data.

    Write

    Using the SMBus write word protocol, use command code 0x50. Place the address of the flash location into the LS byte of the data word. Place the data to be written into the MS byte data word.