• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 33 subscribers
  • Views 310 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TUSB546A-DCI: Power consumption of TUSB546 at Snoop mode operation during DP host sleeping

Feng bin Su
Expert 8700 points
Part Number: TUSB546A-DCI

Hi team,

My customer would like to know the snoop mode operation during DP host sleeping.

If DP host is at sleep and there is no DP signal whether TUSB546's snoop mode can read the information to turn off the high speed lane to decrease the power consumption.

If DP host wakes up, TUSB546 also can detect it to turn on the high speed lane.

Not sure whether it will be shown on AUX during the both situation happened.

  • 0
    TI__Guru**** 176551 points

    HI,

    The TUSB546A-DCI snoops native AUX writes to DisplayPort sink’s DPCD registers 0x00101 (LANE_COUNT_SET) and 0x00600 (SET_POWER_STATE).

    TUSB546A-DCI disables/enables lanes based on value written to LANE_COUNT_SET. The TUSB546A-DCI disables all lanes when SET_POWER_STATE is in the D3 state. Please refer to the DP spec for the SET_POWER_STATE bits definition in the D3 state.

    Thanks
    David