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

2.2.3 I/O and Interrupts

After the TUSB2E221 has been configured into I2C mode, the EQ0, EQ1, and EQ2/INT pins become programmable I/O pins. These 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. SW2 on the EVM controls the VIOSEL pin. To modify the signaling refer to Table 3-8. 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
SW3 position I/O voltage
1-2 (bottom) 1.2V
2-3 (top) 1.8V

The TUSB2E221 also has a cross-point mux which allows the eUSB-USB signal path to between Port 0 of the eUSB port to Port 0 of the USB port as shown in Table 3-9.

Table 2-9 TUSB2E221EVM Mux Configuration
SW1 position eUSB/USB port mapping
1-2 (left) eUSB0->USBA | eUSB1->USBB
2-3 (right) eUSB0->USBB | eUSB1->USBA