SLAU969 December   2025

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 Hardware Overview
    2. 2.2 Power Requirements
    3. 2.3 XDS110 Debug Probe
    4. 2.4 Measure Current Draw of the MSPM33C321A
    5. 2.5 Clocking
    6. 2.6 BoosterPack Plug-in Module Pinout
    7. 2.7 Mikrobus Module Pinout
    8. 2.8 External Storage
    9. 2.9 OLED Display Module
  9. 3Software
    1. 3.1 Software Development Options
    2. 3.2 Out-of-Box
    3. 3.3 CCS Cloud
  10. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials (BOM)
  11. 5Compliance Information
    1. 5.1 Compliance and Certifications
  12. 6Additional Information
    1. 6.1 Trademarks
  13. 7Related Documentation
    1. 7.1 Supplemental Content
  14. 8Revision History

2.4 Measure Current Draw of the MSPM33C321A

To measure the current draw of the MSPM33C321A MCU using a multimeter, use the 3V3 jumper on the J101 jumper isolation block. The current measured includes the target device, LaunchPad circuits, and any current drawn through the BoosterPack plug-in module headers. To measure ultra-low power, follow these steps:

  1. Remove the 3V3 jumper in the J101 isolation block, and attach an ammeter across the 3V3 jumper.
  2. Consider the effect that the backchannel UART and any circuitry attached to the MSPM33C321A can have on the current draw. Consider disconnecting the backchannel uart at the isolation jumper block, or at least consider the current sinking and sourcing capability in the final measurement.
  3. Make sure there are no floating inputs or outputs (I/Os) on the MSPM33C321A. This causes unnecessary extra current draw. Every I/O is either driven or, if the I/O is an input, is pulled or driven to a high or low level.
  4. Begin target execution.
  5. For the most accurate current measurements, place the device in Free Run mode and disconnect programming signals between the MSPM33C321A and the debug portion of the board (header J101).
  6. Measure the current. Remember that if the current levels are fluctuating, then getting a stable measurement can be difficult. Measuring the quiescent states is easier.

To measure the current draw of the VBAT domain:

  • Remove the BAT jumper in the J101 isolation block, and attach an ammeter across the jumper.
  • To isolate from other sources of current draw, TI recommends to power with a separate power source from VDD. To do this apply the voltage to the BAT pin on the MSP side of the board.
  • Measure the current.