SLVUCV7 April   2024 TPS23881B

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 EVM Input/Output Connectors and Switches
    2. 2.2 EVM LEDs
    3. 2.3 EVM Test Points
    4. 2.4 EVM Test Jumpers
    5. 2.5 Quick Start
      1. 2.5.1 Input Power
        1. 2.5.1.1 Input Power (Labeled VPWR)
        2. 2.5.1.2 Local 3.3V (Labeled 3.3V)
        3. 2.5.1.3 External 3.3V (Labeled 3.3 V_USB)
      2. 2.5.2 PoE Port Interfaces
        1. 2.5.2.1 IEEE802.3bt 2-Pair Ports
        2. 2.5.2.2 IEEE802.3bt 4-Pair Ports
      3. 2.5.3 I2C Interfaces
        1. 2.5.3.1 USB2ANY
        2. 2.5.3.2 MSP-EXP430FR5969
      4. 2.5.4 Basic Test Setup Using Autonomous Mode
      5. 2.5.5 Basic Test Setup Using USB2ANY for I2C Interface (Auto Mode or Semi-Auto Mode Operation with I2C Monitoring)
      6. 2.5.6 Advanced Test Setup Using MSP-EX430FR5969 LaunchPad
    6. 2.6 TPS23881B1 Autonomous Operations
  9. 3Software
    1. 3.1 TPS23881B1EVM GUI Setup
      1. 3.1.1 TPS23881B1EVM GUI Installation
      2. 3.1.2 TPS23881B1EVM GUI Operation
      3. 3.1.3 MSP-EXP430FR5969 Details
        1. 3.1.3.1 Basic CCS and Terminal Setup
      4. 3.1.4 MSP430 Reference Code
        1. 3.1.4.1 Overview
        2. 3.1.4.2 Auto Mode
        3. 3.1.4.3 Semi Auto Mode
  10. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 PCB Drawings
      1. 4.2.1 Layout Guidelines
        1. 4.2.1.1 Supply Voltage Decoupling
        2. 4.2.1.2 Port Current Kelvin Sensing
        3. 4.2.1.3 Ground Plane Spacing and Isolation (GND, GND1, and EARTH Nets)
    3. 4.3 Bill of Materials
  11. 5Additional Information
    1. 5.1 Trademarks

3.1.2 TPS23881B1EVM GUI Operation

Start the TPS23881B1EVM GUI by double-clicking the GUI icon. A window similar to Figure 4-1 comes up.

TPS23881B1EVM TPS23881B1EVM GUI Start-up Window Figure 3-1 TPS23881B1EVM GUI Start-up Window

The default device address in the GUI is set to 0x20 which matches the default configuration of the EVM (J4 on the daughter card is installed with jumpers). The GUI sets the TPS23881B1 in configuration B mode (see the GENERAL MASK Register section of the data sheet for details). The address can be programed through the A1 to A4 pins and the I2C address setting in the GUI needs to match the hardware configuration. See the Pin Status Register section of the data sheet for details. The Startup page contains links to the EVM user's guide, TPS23881B1 data sheet, E2E forum and MSP430 reference code. Four popular PD end-equipment images are connected to the PSE switch. Links to the recommended PD device for each end equipment are also provided.

The TPS23881B1 is intended to be operated without loading firmware. If the user wants to load different version of firmware, then click Load Firmware and choose SRAM code as desired.

TPS23881B1EVM TPS23881B1EVM GUI Load Firmware 1 Figure 3-2 TPS23881B1EVM GUI Load Firmware 1
TPS23881B1EVM TPS23881B1EVM GUI Load Firmware 2 Figure 3-3 TPS23881B1EVM GUI Load Firmware 2

Once firmware is successfully loaded and Device Connected displays and port configuration type is selected, click Engineering View.

On the page displayed in Figure 4-4, each port can be configured separately by clicking each RJ45 connector. By default, the TPS23881B1 is configured in OFF Mode. Each port can be configured by clicking the RJ45 icon. Clicking the SET ALL PORTS TO STANDARD button sets all port to standard configurations (configuring ports in Semi-Auto mode, enabling OSS, power policing, and DC disconnect). Clicking the SET ALL PORTS TO AUTO MODE button enables Auto Mode for all ports.

The status of each port is shown on the configuration and telemetry page. The configuration of the ports can also be edited on this page by clicking the RJ45 connector.

If the port is configured in Auto Mode, then the port turns on automatically by the PSE device after connecting a valid PD. If not configured in Auto Mode, then a port enable command is required (4P Enable for 4 pair ports and 2P Enable for 2-pair ports). The port can be turned on only when the PD has valid detection and classification results.

TPS23881B1EVM Device Configuration and Port Telemetry Page Figure 3-4 Device Configuration and Port Telemetry Page

The GUI also provides access to every register of the device in the register map.

TPS23881B1EVM Register Map Figure 3-5 Register Map