SPRUJE5A June   2025  – August 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 Specifications
      1. 1.3.1 External Power Supply or Accessory Requirements
    4. 1.4 Device Information
  7. 2Software
    1. 2.1 Software Description
    2. 2.2 Software Installation
      1. 2.2.1 Install SDK
      2. 2.2.2 Install Additional Software
        1. 2.2.2.1 Install Python
        2. 2.2.2.2 Install OpenSSL
    3. 2.3 Software Development
    4. 2.4 F29H85x LaunchPad Demo Program
    5. 2.5 Programming and Running Other Software on the F29H85x LaunchPad
  8. 3Hardware
    1. 3.1 Hardware Description
      1. 3.1.1 Functional Description and Connections
        1. 3.1.1.1  Microcontroller
        2. 3.1.1.2  PMIC
        3. 3.1.1.3  Power Domains
        4. 3.1.1.4  LEDs
        5. 3.1.1.5  Encoder Connectors
        6. 3.1.1.6  FSI
        7. 3.1.1.7  CAN
        8. 3.1.1.8  SENT
        9. 3.1.1.9  CLB
        10. 3.1.1.10 Boot Modes
        11. 3.1.1.11 BoosterPack Sites
        12. 3.1.1.12 Analog Voltage Reference
        13. 3.1.1.13 Differential ADC Header
        14. 3.1.1.14 Other Headers and Jumpers
          1. 3.1.1.14.1 XDS Isolation Block
          2. 3.1.1.14.2 BoosterPack Site 2 Power Isolation
          3. 3.1.1.14.3 Alternate Power
      2. 3.1.2 Debug Interface
        1. 3.1.2.1 XDS110 Debug Probe
        2. 3.1.2.2 XDS110 Output
        3. 3.1.2.3 Virtual COM Port
      3. 3.1.3 Alternate Routing
        1. 3.1.3.1 Overview
        2. 3.1.3.2 UART Routing
        3. 3.1.3.3 EQEP Routing
        4. 3.1.3.4 CAN Routing
        5. 3.1.3.5 FSI Routing
        6. 3.1.3.6 PWM DAC
      4. 3.1.4 Hardware Revisions
        1. 3.1.4.1 Revision A
  9. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
      1. 4.2.1 LAUNCHXL-F29H85X Board Dimensions
    3. 4.3 Bill of Materials (BOM)
  10. 5Frequently Asked Questions
  11. 6Additional Information
    1. 6.1 Trademarks
  12. 7References
    1. 7.1 Reference Documents
    2. 7.2 Other TI Components Used in This Design
  13. 8Revision History

3.1.1.3 Power Domains

The F29H85x LaunchPad has several power domains that can be connected or isolated from each other with removable shunts. The different 3.3V and 5V power domains are further described in Figure 3-2.

LAUNCHXL-F29H85X LaunchPad Power Distribution Diagram Figure 3-2 LaunchPad Power Distribution Diagram

Table 3-1 describes the usage of the different removable shunts on the LaunchPad board.

Table 3-1 Power Domain Shunts
Shunt Identifier Usage Description
JP1, +5V0 Connects the +5V power from the USB-C connector (+5V0_USB) to the +5V power on the MCU side of the board (+5V0_MCU). Bridges the power and ground isolations between the two board sides.
JP1, GND Connects the board Ground on the isolated USB-C connector side of the board (USB_GND) to the rest of the board ground (GND). Bridges the power and ground isolations between the two board sides.
J18 Disconnects the PMIC and on-board 3.3V when powering from Boosterpack
J17 Enables the on-board 3.3V to 5V BOOST regulator to convert the +3.3V power rail to a +5V power rail.

The F29H85x LaunchPad features a flexible power domain scheme that allows users to supply power to the board in a variety of different configurations. Table 3-2 shows the different power configurations and the required shunts that need to be populated to supply power throughout the board.

Table 3-2 Power Configurations
Power Source Connected Shunts Description of Power Sources
USB-C Connector JP1, J16

+5V0_USB: supplied from the USB-C connector

+5V0_MCU: +5V0_USB passes through JP1 and is the same supply as +5V0_MCU

+3V3_MCU: generated by the MCU-side 5V to 3.3V LDO regulator
External +3.3-V (connected to BoosterPack header) J17

+5V0_USB: If debugging the device, +5V0_USB is supplied through the USB-C connector and is isolated from the MCU side +5V0 rail. Else if not debugging, +5V0_USB is not required.

+5V0_MCU: generated by the 3.3V to 5V BOOST regulator

+3V3_MCU: supplied by external +3.3V source
External +5.0-V (connected to BoosterPack header) J16

+5V0_USB: If debugging the device, +5V0_USB is supplied through the USB-C connector and is isolated from the MCU side +5V0 rail. Else if not debugging, +5V0_USB is not required.

+5V0_MCU: supplied by external +5.0V source

+3V3_MCU: generated by the MCU-side PMIC