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SN65DPHY440SS: use with DSI Screen

CrazyFrogYS
Prodigy 30 points
Part Number: SN65DPHY440SS

Tool/software:

Hello,

I would like  to use SN65DPHY440SS between MIPI DSI type LCD screen and a micro controller, to improve signal integrity.

I would like to implement a SN65DPHY440S between the MPU and the Driver IC of my LCD.

I have a couple a question,

- Can we use the SN65DPHY440SS  WITHOUT the I2C interface of the device. I will implement either pull up or pull down on the VSADJ_CFG0 & EQ/SCL & ERC/SDA & PRE_CFG1

- The SN65DPHY440SS has the bidirectional LP mode supported, but i don't understand how it is set.

Thanks in advance for any hint.

Regards.

  • +1
    TI__Guru**** 168451 points

    Hi,

    Please see my response below.

    - Can we use the SN65DPHY440SS  WITHOUT the I2C interface of the device. I will implement either pull up or pull down on the VSADJ_CFG0 & EQ/SCL & ERC/SDA & PRE_CFG1

    Yes, you can configure DPHY440 in pin strap mode.

    - The SN65DPHY440SS has the bidirectional LP mode supported, but i don't understand how it is set.

    One of the four lanes is used for back channel communications between GPU and DSI panel. DPHY440’s lane 0 is the only lane that supports the back channel. For this reason, DPHY440 lane 0 must always be connected to lane 0 of GPU and panel.

    Thanks

    David