• State TI Thinks Resolved
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 33 subscribers
  • Views 36 views
  • Users 0 members are here
Support feedback
Options
Options
Related

DS160PR410: Redriver for Display Port Application

Haritha B
Prodigy 60 points
Part Number: DS160PR410

Tool/software:

In the datasheet, Figure 13 presents a Simplified Schematic for DisplayPort Application. However, there is no explanation provided regarding the specific connection of PWDN1 and PWDN2. Could you please clarify the rationale behind this configuration and suggest how these pins should ideally be connected?

  • 0
    TI__Guru**** 178126 points

    Hi,

    PWDN1 and PWND2 are two-level logic that control the operating state of the DS160PR410. When they are high, they power down all four channels. Wen they are low, then they  power up all four channels.

    The HPD signal can be used to drive the logic state of PWDN1 and PWDN2 if the system design requires the implementation of DP power states. When HPD is low (disconnect), we want to invert the logic so put the re-driver into low power mode. When HPD is high (connect), we want to invert the logic so re-driver is in normal operating state. 

    But in DisplayPort, HPD not only serves as connect/disconnect, but also as an interrupt (pulse). But when HPD is being used as an interrupt, we want the re-driver to stay in its normal operating state. The circuit in Figure 13 serves as an idea to filter out the logic low portion of the HPD pulse, but the exact implementation is up to the customer design.

    Thanks

    David