1. UCD3138 has two programming methods, JTAG and PMBUS 2. JTAG programming class is programming. 3. Use the programmer, but after the UCD3138 is reset, the initial value of the JTAG port is closed. You need to use the PMBUS debugger to open the JTAG port before you can use the programmer to program and debug. 4. The TI training content is clearly stated at http://training.eeworld.com.cn/TI/video/18798, which requires USB to GPIO, also known as USB Interface Adapter. 5. Changing PID parameters online requires PMBUS mode. Function:Enhanced Version With A Suffix (Increased High Adc Accuracy, Hardware Baud Rate Function, Synchronous Rectification Control Pin, Enhanced Duty Cycle Reading, Etc.) Product Category:Power Management IC Development Tools Type:Power Management Input Voltage:3.3V Tools Used For Evaluation:UCD3138064 Interface Type:12C, SPI, USB Product Type:Power Management C Development Tools Note:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Colour:As Shown Material:PCB Package Contents: 1 * Motherboard Module 1 Set * Installation Tools 1 * Pin Header Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.