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DS125DF410 Register 0xFF Bit 2 has a problem (Bit 0 bit 1 bit 2 etc...)

Redwood
Expert 1060 points
Other Parts Discussed in Thread: DS125DF410

Hi,

According to the data sheet of DS125DF410 , register 0xFF bits from 0 to 7 have all Read/Write feature. But Whenever I try to write to bit 2 (like 0x04) or any combination of bits with bit2 (setting 1) I am getting A5 when I read register 0xFF. If I leave bit 2 as zero and play with the rest of the bits of register 0xFF, they are ok. This doesn't make any sense according to the data sheet of this part (DS125DF410) 

Thanks and best regards,

  • 0
    TI__Mastermind 29655 points
    Hi Bugra,

    In the datasheet in Section 7.6.4, we state that "the contents of the channel select register, reg 0xff, cannot be read back over the SMBus. The DS125DF410 will accept the register write you initiate, but it will not respond with the written value if you attempt to read back. Aside from other bits that are Read-Only or Self-Clearing, only Reg 0xFF operates in this manner.

    I believe your question is related to the questions you have already posted in another thread:

    e2e.ti.com/.../1791568

    Please follow-up with regards to future related questions in the link above.

    Michael