SNLU346 May   2024 TUSB2E221

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1 Getting Started
    2. 2.2 EVM Configuration
      1. 2.2.1 Power Modes
        1. 2.2.1.1 Self-Powered Configuration
        2. 2.2.1.2 Bus-powered Configuration
        3. 2.2.1.3 External Power
      2. 2.2.2 Functional Modes
        1. 2.2.2.1 I2C-Enabled Repeater Mode
        2. 2.2.2.2 GPIO Repeater Mode
        3. 2.2.2.3 UART Mode
      3. 2.2.3 I/O and Interrupts
  8. 3Hardware Design Files
    1. 3.1 Schematic
    2. 3.2 Board Layout
    3. 3.3 Bill of Materials
  9. 4Additional Information
    1. 4.1 Trademarks

Bus-powered Configuration

When VBUS is provided through the micro-USB connector, the TUSB2E221EVM does not require an external 5V supply. Make sure that 5V is not already being provided to the EVM through other sources by configuring the EVM headers as shown in Table 3-4.

Table 2-3 EVM Bus Power Configuration
Designator Installed Description
J1 Yes VBUS to J5 micro-USB Port A connector
J3 No 5V Rail and DC Jack to VBUS
J6 Yes VBUS to J10 micro-USB Port B connector
J14 Yes 5V input to 3.3V LDO
J15 Yes 1.8V supply rail to 1.8V IO rail
J16 Yes 1.8V LDO output to 1.8V supply rail
J17 Yes 3.3V supply rail to 1.8V LDO

After configuring the EVM, plug the USB host into either the J1 or J6 micro-USB connector. Using this method to provide power is useful while the TUSB2E221 is configured as a bus-powered device.