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BQ40Z50 ManufacturerAccess() 命令无效

huan Li3
Intellectual 319 points
Other Parts Discussed in Thread: BQ40Z50, BQSTUDIO

1.自制BQ40Z50锂电池管理板成功连接上BQStudio。

2.按手册描述发送命令0x44 数据 0x0020，在ManufacturingStatus()[FET_EN] = 0的情况下，可以使得ManufacturingStatus()[DSG_TEST] = 1。但是发送之后，刷新数据，却没有效果，一直发送，可以发送成功，但是没有效果。

3.以下是截图说明。

  • 0
    Expert 1255 points

    huan,

    BQ40Z50有两种MAC 指令方式：0x00 ManufacturerAccess() and 0x44 ManufacturerBlockAccess()

    ManufacturerAccess() 用的是0X00指令，而不是0x44，你改成0x00用WORD读方式就OK了。或者继续用0X44指令改为Block Write方式也OK。

    The MAC command is sent via ManufacturerBlockAccess() by the SMBus block protocol.

    Note that MAC commands are sent through ManufacturerAccess() (0x00) by an SMBus write word protocol.