• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 46 subscribers
  • Views 424 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.

LMP90078 with internal clock only, SPI Fail to RW

Po-Chen Lin
Prodigy 150 points
Other Parts Discussed in Thread: LMP90078, LMP90100

Hi,

  Can I use LMP90078 without external clock ?

Now I can not communicate with it through SPI.

Following is my timing chart from LA.

What's the problem could be ?

Thank you~

I write INS 1 = 0x10 0x00 and INS 2 = 0x89 0xXX to read a address 0x09 register.

But there is always no response.

 

  • 0
    TI__Expert 3350 points

    The LMP90100 requires an external crystal or a clock signal from an external source in the system. For programing guide please refer to the application note SNAA075A (AN-2181 Microcontroller Firmware Considerations for National LMP90100 Sensor AFE) at the following link.