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

2.2.3 I/O and Interrupts

After the TUSB2E221 is configured for I2C mode, the EQ0, EQ1, and EQ2/INT pins can be used as programmable I/O pins. These pins can be useful in situations where system debug is necessary, or side-band signaling is needed.

The TUSB2E221 can be configured to use either 1.8V or 1.2V I/O voltages. SW1 on the EVM controls the VIOSEL pin. To modify the signaling, refer to Table 2-8. Changing this setting modifies the threshold voltage of the EQ0, EQ1, EQ2/INT, SCL and SDA pins.

Table 2-8 TUSB2E221EVM I/O Voltage Switch
SW1 PositionI/O Voltage
1-2 (bottom)1.2V
2-3 (top)1.8V