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CC2745R10-Q1: CAN_FD PLL parameter

Angela Zou
Intellectual 1095 points

Part Number: CC2745R10-Q1
Other Parts Discussed in Thread: SYSCONFIG

Hi expert,

Could you provide the parameters Short-term jitter [ps] and Long-term jitter [ps] of CAN FD PLL? How to configure the CAN clock to 40M? Could I configure it in sysconfig? Thank you.

  • 0
    TI__Intellectual 1880 points

    Hello Angela,

    I am not sure what you mean by short-term jitter and long-term jitter configuration, but CAN timing configuration is done using the MCAN_BitTiming params. The link below outlines all of our structs and references for CAN driver for more information. Thanks!

    Best,
    Eshaan
  • 0 in reply to Eshaan Tibrewala
    TI__Intellectual 1095 points

    Hi Eshaan,

    I need to get the parameters of  Short-term jitter [ps] and Long-term jitter [ps] in below table, could you please provide the two parameters?

  • 0 in reply to Angela Zou
    TI__Intellectual 1880 points

    Hello Angela,

    This is directly from the datasheet of the CC2745:


    "The 80/90.3168/98.304 MHz AFOSC (Auxiliary Frequency Oscillator) is used as the high-frequency clock for generating needed frequencies to support for CAN-FD and audio I2S operations. The AFOSC tracks the HFOSC which in turn, tracks its accuracy against the external 48MHz crystal (HFXT). AFOSC can generate 80, 90.3168, and 98.304MHz clock frequencies with a 10ppb tracking accuracy from HFOSC."

    I believe that last part is what you are looking for. Thanks.

    Best,

    Eshaan