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DS90UB954-Q1: CSI-2 data rate

Nao
Genius 4905 points
Part Number: DS90UB954-Q1
Other Parts Discussed in Thread: DS90UB953-Q1

Hi, E2E members

We are planing to use some sensers that CSI-2 data rate are 184 ~ 506Mbps.

- Can we use the following setting DS90UB953 and DS90UB954?
DS90UB953-Q1 input : 184Mbps x 1 lane →　DS90UB954-Q1 output : 800Mbps x 1 lane
DS90UB953-Q1 input : 506Mbps x 1 lane →　DS90UB954-Q1 output : 800Mbps x 1 lane

1) Can the DS90UB954-Q1 use the setting of CSI-2 data rate of 800Mbps, regardless of CSI-2 data rate of DS90UB953-Q1 side?

2) Dose DS90UB954-Q1 have to change CSI-2 data rate of 400Mbps, if DS90UB953-Q1 input data rate below the 400Mbps?

Regards,
Nao

  • 0
    TI__Genius 10475 points
    Hello,
    Please refer to the 954 datasheet for information on CSI-2 rates.

    The CSI-2 rate is independent of the forward channel line rate in synchronous mode or asynchronous with external clock mode. The CSI-2 rates supported by the 954 can be 400Mbps/800Mbps/1.6Gbps per lane.

    When the input rate is slower than the output, the 954 will output data on the CSI only when there is available data packet to send. It will go into the lower power state as per MIPI CSI-2 specification when there is no data available to send.
  • 0 in reply to Palaniappan Manickam
    Genius 4905 points
    Hi, Palaniappan

    Thank you for your quick reply.

    Regards,
    Nao