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

4.1 Basic SMBUS Transaction Types Supported

Because PMBUS communication is derived from SMBUS communication, they share basic SMBUS transaction types in common. These basic SMBUS transaction types include:

  • Send byte
  • Receive byte
  • Write byte
  • Read byte
  • Write word
  • Read word
  • Block write
  • Block read
  • Process call
  • Block read – block write process call

In addition, PMBUS communication also supports Group command.

All these commands are implemented in the USB Interface Adapter firmware.