• State Resolved
  • Locked Locked
  • Replies 5 replies
  • Subscribers 54 subscribers
  • Views 481 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.

What frequency is worked in CC1120

Nomo
Guru 16800 points
Other Parts Discussed in Thread: CC1120

Hello,

In case of that the 32MHz oscillator is used, what frequency is worked for the whole of digital parts in CC1120?
For example, I want to know the frequency of MARC, FIFO and so on.

Best Regards,

Nomoto

  • 0
    TI__Mastermind 27145 points

    Hi,

    Please see Table-1 of CC112x user guide

    Thanks,

    PM

  • 0 in reply to PM
    Guru 16800 points

    Hello,

    It seems that Table-1 shows only SCLK (SPI clock).
    How about the other clocks?

    Best Regards,

    Nomoto

  • 0 in reply to Nomo
    TI__Guru* 79501 points

     

    Hi Nomoto

    Why do you need this info?

    The only thing the user needs to know is the speed the MCU can run the SPI on to communicate with the radio and how the RF parameters are depending on the crystal frequency.

    BR

    Siri

  • 0 in reply to Siri
    Guru 16800 points

    Hello Siri-san,

    The background of my question is that I want to know the frequency which influences the RF performance.
    I think internal frequency influences the RF performance; for example, it will make spurious signals.

    Best Regards,

    Nomoto

     

  • 0 in reply to Nomo
    TI__Guru* 79501 points

    Hi Yusuke-san

    The following is stated in the data sheet:

    "It is expected that there be will degraded sensitivity at multiples of XOSC/2 in RX, and an increase in spurious emissions when the RF channel is close to multiples of XOSC Crystal frequency 32 33.6 MHz in TX. We recommend that the RF channel is kept RX_BW/2 away from XOSC/2 in RX, and that the level of spurious emissions be evaluated if the RF channel is closer than 1 MHz to multiples of XOSC in TX."

    BR

    Siri