• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 53 subscribers
  • Views 145 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

CC1125: Is FREQOFF affected by FREQOFF_CFG ?

Andy Neil
Guru 35425 points
Part Number: CC1125

The CC1125 has a FREQOFF register (or, rather, pair of registers)  which specifies an offset to the frequency given by the FREQ registers.

Am I correct in thinking that this offset is always applied - there is no way to disable it ?

ie, if you want no offset, you must just set the FREQOFF  value to zero.

I ask because there is also a register called (unhelpfully?) FREQOFF_CFG

Clearly, the name suggests that it would affect the operation of FREQOFF  - but the description seems entirely unrelated ?

Please clarify!

  • 0
    TI__Guru**** 317180 points

    FREQOFF is used if you want to add a offset frequency. This is covered in 9.12 in https://www.ti.com/lit/ug/swru295e/swru295e.pdf. As the equations show the content FREQOFF registers is always used to calculate the final frequency.

    FREQOFF_CFG: As you can see from the register description, this controls how Frequency Offset Correction should be done and this is NOT related to the FREQOFF register. Search for FREQOFF_CFG in the UserGuide to see how this register can be used. 

    What is the background for your question?

  • 0 in reply to TER
    Guru 35425 points

    Thanks - that was my understanding of reading the User Guide.

    I was just worried by the unhelpful & misleading choice of name for the FREQOFF_CFG register - which clearly suggests that it might affect the use of the FREQOFF register!