SLAU968 December   2025

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  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 Power Requirements
    2. 2.2 Setup
    3. 2.3 Jumper Information
    4. 2.4 PMBus Address Configuration
    5. 2.5 Header Information
    6. 2.6 Push Buttons
    7. 2.7 Interfaces
    8. 2.8 Debug Information
    9. 2.9 Test Points
  8. 3Software
    1. 3.1 Software Description
    2. 3.2 GUI Installation
    3. 3.3 Programming Options
  9. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials (BOM)
  10. 5Additional Information
    1. 5.1 Trademarks
  11. 6Related Documentation
    1. 6.1 Supplemental Content
  12. 7References
  13.   Revision History

2.3 Jumper Information

Table 2-1 Jumper Descriptions
Jumper Label Description

J1

VREF Configuration - J1 allows the user to configure the VREF circuitry depending on whether internal or external VREF is used. When using internal VREF, this jumper should be closed to make use of the VREF bypass capacitor, C3. When using external VREF, this jumper should be unpopulated.

J2

VREF Configuration -J2 allows the user to configure the VREF circuitry depending on whether internal or external VREF is used. When using internal VREF, this jumper should be open. When using external VREF, this jumper can be closed to use the VDD rail on the PCB, or can be left unpopulated to use a voltage reference connected to the test point (TP3).

J3

LDO Output jumper - Used to connect the 3.3V LDO output to the monitoring circuit.

J4

LDO Feedback jumper - Used to connect the UCD91320 Margining output to the feedback pin of the 3.3V LDO

J5

LDO Enable Configuration - Allows the user to select how the 3.3V LDO is enabled using a shunt jumper. 1-2 selects the EN1 signal from the UCD91320, 2-3 selects the 5V power rail to enable the LDO at all times.

J6

 LDO Output jumper - Used to connect the 2.5V LDO output to the monitoring circuit.

J7

 LDO Feedback jumper - Used to connect the UCD91320 Margining output to the feedback pin of the 2.5V

LDO

J8

 LDO Enable Configuration - Allows the user to select how the 2.5V LDO is enabled using a shunt jumper. 1-2 selects the EN2 signal from the UCD91320, 2-3 selects the 5V power rail to enable the LDO at all times.

J9

 LDO Output jumper - Used to connect the 1.8V LDO output to the monitoring circuit.

J10

 LDO Feedback jumper - Used to connect the UCD91320 Margining output to the feedback pin of the 1.8V

LDO

J11

5V Power Configuration Jumper - Selects power supply for the device using a shunt jumper. 1-2 selects the Micro-USB connector as the power source. 2-3 selects an external 5V power supply.

J12

 LDO Enable Configuration - Allows the user to select how the 1.8V LDO is enabled using a shunt jumper. 1-2 selects the EN3 signal from the UCD91320, 2-3 selects the 5V power rail to enable the LDO at all times.

J13

 LDO Output jumper - Used to connect the 1.2V LDO output to the monitoring circuit.

J14

 LDO Feedback jumper - Used to connect the UCD91320 Margining output to the feedback pin of the 1.2V

LDO

J15

 LDO Enable Configuration - Allows the user to select how the 1.8V LDO is enabled using a shunt jumper. 1-2 selects the EN4 signal from the UCD91320, 2-3 selects the 5V power rail to enable the LDO at all times.

J27

GPIO1 - extra pin to enable connection between GPIO1 and the USB-to-GPIO2 device. Close this jumper to allow the USB-to-GPIO2 to interface with the UCD91320's GPIO1

J28

PMBus Address selector 2 - See PMBus Address Configuration

J29

PMBus Address selector 1 - See PMBus Address Configuration

J30

PMBus Address selector 0 - See PMBus Address Configuration

J31

 GPIO2 - extra pin to enable connection between GPIO2 and the USB-to-GPIO2 device. Close this jumper to allow the USB-to-GPIO2 to interface with the UCD91320's GPIO2