SLAU928 May   2024 MSPM0L2228

 

  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 MSPM0L2228
    5. 2.5 Clocking
    6. 2.6 BoosterPack Plug-in Module Pinout
    7. 2.7 Liquid Crystal Display (LCD)
  9. 3Software
    1. 3.1 Software Development Options
    2. 3.2 Out-of-Box GUI
    3. 3.3 CCS Cloud
  10. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 Bill of Materials (BOM)
  11. 5Additional Information
    1. 5.1 Trademarks
  12. 6Related Documentation
    1. 6.1 Supplemental Content

2.4 Measure Current Draw of the MSPM0L2228

To measure the current draw of the MSPM0L2228 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:

  • Remove the 3V3 jumper in the J101 isolation block, and attach an ammeter across this jumper.
  • Consider the effect that the backchannel UART and any circuitry attached to the MSPM0L2228 can have on the current draw. Consider disconnecting these at the isolation jumper block, or at least consider the current sinking and sourcing capability in the final measurement.
  • Make sure there are no floating inputs/outputs (I/Os) on the MSPM0L2228. 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.
  • Begin target execution.
  • For the most accurate current measurements, place the device in Free Run mode and disconnect programming signals between the MSPM0L2228 and the debug portion of the board (header J101).
  • Measure the current. Keep in mind 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.
Note: For XMSPM0L2228 parts, the VBAT current draw is higher than expected. This is fixed in the released version of the part. The released version of the part does not have an X-marking on silkscreen.