SLLU327 May   2020 TUSB217A

 

  1.   Trademarks
  2. 1TUSB217AEVM-BC
  3. 2TUSB217AEVM-BC Board Description
  4. 3TUSB217AEVM-BC Kit Contents
  5. 4EVM Configuration
    1. 4.1 Setting EVM Jumpers
    2. 4.2 Selecting Configuration Levels
    3. 4.3 Battery Charging Functions of TUSB217A
      1. 4.3.1 Automatic DCP/CDP Test Setup
      2. 4.3.2 Manual DCP/CDP Test Setup
  6. 5EVM Operation
  7. 6TUSB217AEVM-BC Schematics
  8. 7TUSB217AEVM-BC Bill of Materials (BOM)

4.3 Battery Charging Functions of TUSB217A

The DCP/CDP pin of the TUSB217A is a battery charging 1.2 Dedicated Charging Port (DCP) and Charging Downstream Port (CDP) function enable. In the shared TUSB216IEVM and TUSB217AEVM-BC schematic, this pin is listed as CDP_ENZ. By default, the TUSB217A has the battery charging 1.2 CDP function enabled with a 500-kΩ internal pullup.

When TUSB217A is disconnected from the USB 2.0 data stream, the DCP mode of the TUSB217A can then be enabled to allow the DCP handshake to be performed. It is recommended that when the TUSB217A switches from CDP to DCP mode or back, that downstream VBUS is toggled so any downstream devices reconnect.