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TMP1075: Some quesitons

Shu-Cheng LIN
Guru 11785 points
Part Number: TMP1075

Hi Sirs,

Sorry to bother you.

I have some questions about TMP1075, in its datasheet page 19th, "Table 5. Temperature Register"

1.Could you tell me what is the meaning about D0~D15 and T0~T11?

2.If I want to get the temperature result, can I read the Temperature Register directly by i2c-tools?

  • 0
    TI__Guru* 90906 points

    Dear Shu-Cheng - 

    1. D0-D15 (on page 21) refer to the bit number of the register 0x0F, where D0 is LSbit and D15 is MSbit. T0-T11 (on page 20) are same representation, but for the temperature register. For that one, since its 12 bit value, this is also to show which bits to ignore or mask off (the lowest 4 bits or nibble of the second byte) when reading out the full two bytes from that register.  

    2. Yes, using I2C to read register 0x00 is the intended way for you to get the temperature result, after temperature measurement and conversion has been made. When we indicate a device is digital sensor, we mean it uses I2C or SPI to communicate the result, versus when we indicate a device is analog sensor, this means it has output which is either a voltage or a current.