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LM75A Question

Vera Mao
Expert 5065 points
Other Parts Discussed in Thread: LM75A

hi dear supporting team,

customer found the configuration register of LM75A is revised to 0XA4 with unknown reason, and that cause they can not read precise temp number.  so they want to double check whether 0x4A will cause the issue? tks a lot!

  • 0
    TI__Mastermind 31590 points
    Hi Vera,
    At power up, the configuration register should be all zeros. I would suggest that cusomter should use the oscilloscope I2C decoder monitoring the configuration register (0x01) if it is being written into the LM75A. D7 to D5 must be kept zeros at all the time. Setting any of these bits to a "1" will place the part into some weird mode.
    Hope this helps! Please let me know if you have any further question.Aaron