SNLU354 November   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
    2. 4.2 Related Documentation

Bus-Powered Configuration

When VBUS is provided through the USB connector, the TUSB2E221QFNEVM 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 2-4.

Table 2-3 EVM Bus Power Configuration
DesignatorInstalledDescription
J3

Yes

VBUS to J4 USB Port A connector
J2Yes5V Rail and DC Jack to VBUS
J10

Yes

VBUS to J4 USB Port B connector
J14Yes3.3V LDO to 3.3V
J15Yes3.3V supply rail to 1.8V input
J16Yes1.8V LDO output to 1.8V supply rail
J17Yes1.8V supply rail to 1.8V IO

After configuring the EVM, plug the USB host into the J4 USB connector using a Type-A to Type-B adapter. This method of providing power is useful while the TUSB2E221 is configured as a bus-powered device.