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DS90UB953-Q1: BCC GPIO bit rate

Tomoaki Yoshida91
Genius 5255 points
Part Number: DS90UB953-Q1
Other Parts Discussed in Thread: DS90UB954-Q1

Hi team,

I would like to know BCC GPIO bit rate.

If it is set to 10Mbps with the BCC_CONFIG.BC_FREQ_SELECT register, I think that each GPIO terminal inputs and outputs at a data rate of 10Mbps.

Is this correct?

Best regards,

Tomoaki yoshida

  • 0
    TI__Expert 3055 points
    Hello Yoshida-san,

    As the back channel GPIOs are sampled and sent each back channel frame by DS90UB954-Q1 deserializer the latency and jitter timing are each on the order of one back channel frame, 30 x 1/10 MHz = 3 µs at 10 Mbps.

    The back channel GPIO is effectively sampled at a rate of 1/30 of the back channel rate or 334 kHz. It is recommended the input to back channel GPIO switching frequency is < 1/4 of the sampling rate, in this case 83.5 kHz.

    Regards,
    Zoe