Gated Clock for SPORT in Receive Mode

I am using SPORT 0B of ADSP-SC584 processor in RX mode to communicate with LTC2344-18 ADC. I am using an externally gated clock which remains active for about 24 clock cycles during the same time I am keeping the frame sync active. After that, frame sync goes inactive and clock remains at logic high, until it's time to read next word. I am doing this to read 24 bits in every frame sync.

However, this approach doesn't work and SPORT can't read the data. Keeping all other settings same, it works when i give a continuous clock to SPORT, instead of gated clock. Is there any special requirement when using external gated clock and normal external frame sync in SPORT RX mode?

  • 0
    •  Analog Employees 
    on Sep 11, 2019 6:09 AM


    I understand that you want to use SPORT gated clock mode. Please correct if my understanding is wrong. For using SPORT in gated clock mode, there are few requirements to be followed as listed in SPORT Gated Clock chapter(Pg. No.: 2700 / 3973) of the Hardware Reference Manual. The link for downloading the manual is given below. Please ensure that you follow all these requirements.

    Anand Selvaraj.