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BQ40Z80: Communication mode

shu jie
Prodigy 50 points
Part Number: BQ40Z80

Hi，

I would like to ask about the use of BQ40Z80 communication mode.

It can be seen in the data manual that ordinary SMBUS communication can be used. For commands like 0x21, data like 0x16 0x21 0x17 without PEC can be directly used for communication. And some data states like 0x57 must be ManufacturerAccess or ManufacturerBlockAccess (at least I can't read back using the first scenario). Do these modes coexist in the communication process, with different registers using different ways to read and write? Can I use my Z80?

Another question about PEC, can this test be turned off?

Thanks

ShuJie

  • +1
    TI__Guru** 105590 points

    Hello Shu,

    Can you clarify and share any screenshots of the specific sections you are referring to?

    You should follow the SMBus specification in order to know the proper command sequence. The sequence changes depending on if you are only sending a command, reading/writing only a word, or doing a whole block read/write.

    http://smbus.org/specs/smbus110.pdf

    The second question about disabling PEC was answered on your other thread.

    Sincerely,

    Wyatt Keller