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SN75DPHY440SS: Could SN75DPHY440SS can do the MIPI switch application?

George Liu1
Intellectual 1570 points
Part Number: SN75DPHY440SS
Other Parts Discussed in Thread: TS5MP646

Hi Sir,

I got some quick question from customer, please help to check it.

Could SN75DPHY440SSRHRR be used as a MIPI switch function?

If use RST pin as a MIPI switch function will it cause any problems?

 

EX:  MIPI camera off : RST pin keep low

        MIPI camera on : RST pin keep high

 

Thanks,

George

  • 0
    TI__Guru**** 177676 points

    George

    For MIPI switch, please take a look at the TS5MP646.

    Thanks

    David

  • 0 in reply to David (ASIC) Liu
    TI__Intellectual 1570 points

    Hi David,

    Sorry for the misunderstanding, I re-check with customer about their question.

    Their question would be simple, one of the scenario will need to close their Cam temporarily.

    For this kind of case, could they direct keeping low on the RSTN? After end-user resume the Cam then keep high for the RSTN.

    Would it got any concern or impact on this method? Data will be cut when RSTN be low and resume by keep high without any initialized?

    OR, power rail (Vcc) cut will be the better way to let device not sending any data to Cam?

    Looking forward to hearing from your comments.

    Thanks,

    George 

  • 0 in reply to George Liu1
    TI__Guru**** 177676 points

    George

    By asserting the RSTN pin low while maintaining a stable VCC and VDD power supply, the DPHY440 is in the Shutdown mode. While in the Shutdown mode, the DPHY440 drives DB[3:0]P/N and DBCP/N pins to the LP00 state. The DPHY440 ignores all activity on the DA[3:0]P/N and DACP/N pins while in Shutdown mode. The Shutdown mode is exited by de-asserting the RSTN pin high. Upon exiting Shutdown mode, the DPHY440 enters LP Mode operation and pass what is received on the DA interface to the DB interface.

    Thanks

    David