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Original question:

RTOS: CPTS timestamp

TDA4VM: CPTS question

Gaston yan
Intellectual 535 points
Other Parts Discussed in Thread: TDA4VM

Hi experts:

                The soc we use is TDA4VM, sdk0703

                Here are a few CPTS questions for you to ask:
                1. TDA4 has main domain and mcu domain. My understanding is that both main domain and mcu domain have CPTS module. However, in the system block diagram, main domain shows that there is CPTS                             module, but mcu domain does not show that there is CPTS module. It is very strange. is strange

                     
                2. The GTC or CPTS clock is several hundred megabytes, and it does not reach 1G. The time accuracy cannot reach 1ns. I don’t know if my understanding is correct.        

   

  • +1
    TI__Guru 64520 points

    Hi,

    Gaston yan said:
    1. TDA4 has main domain and mcu domain. My understanding is that both main domain and mcu domain have CPTS module. However, in the system block diagram, main domain shows that there is CPTS                             module, but mcu domain does not show that there is CPTS module. It is very strange. is strange

    Yes, Both Main Domain CPSW and MCU Domain CPSW has CPTS modules.
    Please refer to TD & TRM for more details.

    Gaston yan said:
      2. The GTC or CPTS clock is several hundred megabytes, and it does not reach 1G. The time accuracy cannot reach 1ns. I don’t know if my understanding is correct.

    Yes, The frequency of CPTS clock is in Megabytes not 1G. The time accuracy can't reach 1nsec.

    Best Regards,
    Sudheer