• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 30 subscribers
  • Views 607 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TMP103, meaning of the 7th bit of configuration reg., frozen data register to 0x7f

Tom Mainzer
Prodigy 10 points
Other Parts Discussed in Thread: TMP103

Hi,

I have TMP103 - after reset

- From configuration reg (reg1) I read 0x92  - What is the meaning of 7th bit? (there is no infomation in datasheet)

- from data register (reg0) reading all the time value 0x7f , no change with temperature - is any posible explanation for this?

- from limit registers (reg.2,reg.3) I read values specified in datasheet (e.g. -10 and 60 dgC)

Thanks for any reply. With best regard T.M.

  • 0
    TI__Mastermind 43715 points
    Are you asking about the ID bit in the configuration register? This bit is read-only, and will always report a 1. It's for TI internal use only.

    Thank you for confirming that you can correctly read the limit registers. I don't see a reason for the temperature register 0 to be stuck at 0x7F, unless something very unusual is happening. Is it possible you are setting the device to Shutdown (M1, M0 = 0) within 26ms of power-on? This would prevent the device from completing it's first temperature conversion, and from updating the contents of the temperature register.

    Thanks,
    Ren