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BQ78350-R1: Different Manufacturer Access values

BHUSHAN SAHAY
Expert 1085 points
Part Number: BQ78350-R1

Hi,

I am communicating with BQ78350-R1 IC using SMB protocol. I am using Microchip PIC32MX as SMB master. My issue is that on first attempt after power-on, PIC32 is receiving 0x0D01 when reading register 0(manufacturer access register) and afterwards it is receiving 0x092D. When I am reading BQ78350-R1 ic using BQ-Studio then I always get 0x092D.

What is the first value(0x0D01) is about?

  • 0
    TI__Guru* 81034 points

    Hi Bhushan,

    Reading from 0x0000 returns the last 16 bits of the OperationStatus(). (See section 17.2.1 and 17.2.38 of the BQ78350-R1 Technical Reference Manual). You are observing the status bits changing during the initial boot of the device.

    Best regards,

    Matt