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

1.3 Specification

The TUSB2E221 device is designed to comply with the Embedded USB2 (eUSB2) Physical Layer Supplement to the USB Revision 2.0 Specification published by the USB-IF. This specification defines three primary states for a eUSB repeater: default, host, and peripheral states. After powering on the EVM, the TUSB2E221 is in the default state and awaiting configuration as a host or peripheral repeater. Configuration occurs over the eUSB interface by either the eUSB Host or eUSB device. For more information about configuration, refer to the Embedded USB2 (eUSB2) Physical Layer Supplement to the USB Revision 2.0 Specification.

The diagrams shown below describe the system setup using the TUSB2E221EVM with an eUSB host or an eUSB peripheral.


TUSB2E221EVM TUSB2E221EVM Host Repeater Diagram

Figure 1-1 TUSB2E221EVM Host Repeater Diagram

In the default state, the TUSB2E221 does not forward eUSB or USB packets. When an eUSB2 host is connected to the eUSB ports of the TUSB2E221EVM, the repeater must be configured as a host repeater by the eUSB host. A 5V power source must be provided to the EVM to power to the device.


TUSB2E221EVM TUSB2E221EVM Self-powered Peripheral Repeater Diagram

Figure 1-2 TUSB2E221EVM Self-powered Peripheral Repeater Diagram

When the eUSB ports are connected to an eUSB device, as shown Figure 2-2, the TUSB2E221 must be configured as a peripheral repeater. In a self-powered configuration, an external 5V source is provided.


TUSB2E221EVM TUSB2E221EVM Bus-powered Peripheral Repeater Diagram

Figure 1-3 TUSB2E221EVM Bus-powered Peripheral Repeater Diagram

A 5V power source can also be provided by the USB bus. When VBUS is used to power the EVM, VBUS is referred to a bus-powered application. An eUSB device is still attached to the eUSB port of the TUSB2E221EVM, so the EVM must be configured as a peripheral repeater.