SLLU349 August   2022

 

  1.   Abstract
  2.   Trademarks
  3. 1Read This First
    1. 1.1 Information About Cautions and Warnings
    2. 1.2 FCC Warning
  4. 2What is in the Box
    1. 2.1 List of Hardware Items for Operation
    2. 2.2 List of Software Items for Operation
  5. 3Summary of Hardware Design
    1. 3.1 Ribbon-Cable Connector J2 and Pinout
    2. 3.2 Configuration of Pullup Resistors for Pins 8, 9, and 10
    3. 3.3 LED Indication of USB Attached
    4. 3.4 Step-by-Step Instructions for Operation and Troubleshooting
  6. 4PMBUS and SMBUS Communications
    1. 4.1 Basic SMBUS Transaction Types Supported
    2. 4.2 Special Signals Used for PMBUS and SMBUS Communications
    3. 4.3 Packet Error Checking (PEC) Implementation
    4. 4.4 Communication Clock Speed and Clock Stretching

3.4 Step-by-Step Instructions for Operation and Troubleshooting

After the user has acquired the necessary hardware and software, follow these steps to operate the USB interface adapter:

  1. Plug in the USB cable to both the PC and the USB interface adapter and wait for the green LED to illuminate.
    Troubleshooting: If the green LED does not illuminate after 30 seconds, check to ensure the USB cable is securely connected. If the connection is secure, try a different USB port. If a different USB port does not solve the problem, try to reboot the computer. If rebooting the computer does not fix the problem, try a different USB cable. If trying different USB cable does not solve the problem, contact TI technical support for help.
  2. Plug in the 10-pin ribbon cable to both the USB interface adapter and an I2C device board. Make sure that the notch on the ribbon-cable connector matches the keyhole of the socket in the enclosure.
  3. Power up the I2C board. Note that the default I2C speed is set at 100 kHz and the default pullups for I2C data and clock lines are set at 2.2 kΩ.
  4. Open the Fusion Digital Power designer tool and follow the instructions for the GUI.
    Troubleshooting: If the I2C target board cannot talk with the USB interface adapter, first check to ensure the 10-pin ribbon cable has been securely connected. If the ribbon cable has been securely connected, check the I2C communication speed and the pullups for I2C data and clock lines suitable for the application. If not, modify the I2C communication speed and the pullups accordingly. If this still does not solve the problem, contact the manufacturer of the I2C targeted board for help.
Figure 3-1 Simplified Connection Block-Diagram