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DS90UB954-Q1: How to Reduce the Transmission Speed of Coaxial Line

WU YISYUAN
Expert 2165 points
Part Number: DS90UB954-Q1


Hi,

     We want to reduce DS90UB954Q1's transmission speed.

     In the case of CSI-2mode&Synchronous mode&REFCLK=25MHz, how to reduce the LINE RATE of FPDLINK from 4.0Gbps to 2.0Gbps (for transmitting 1080P30fps video) through software configuration, in order to reduce the transmission speed of the coaxial line.

    

thanks.

  • 0
    TI__Guru** 103215 points

    Hello Wu,

    You just need to adjust the back channel speed from 50Mbps to 25Mbps in register 0x58. In synchronous mode the back channel is recovered by the serializer and is used to set the forward channel speed. So reducing the back channel in half cuts the forward channel speed in half too. 

    Best Regards,

    Casey