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)

4.2 Selecting Configuration Levels

The primary purpose of the USB 2.0 signal conditioner is to restore the signal integrity of a USB High-Speed channel to USB 2.0 compliant levels. The platform goal is to pass the USB Near-End or Far-End Eye Mask with the device in the best location.

A typical use case is to place the USB 2.0 signal conditioner close to the USB connector on a host platform to pass Near-End Eye Mask testing. This includes systems where the USB connector may be placed at the far-end of a cable.

Typical RX sensitivity and boost recommendations based on cable length (28 AWG USB cable) are shown in Table 4-4. TI recommends starting with the lower settings first

Table 4-4 RX_SEN, BOOST Setting Based on Cable Length
Cable Length BOOST RX_SEN
0 m - 2 m Level 0 MID
3 m - 5 m Level 1 MID, HIGH