SLAAE71 December   2022 MSPM0G1105 , MSPM0G1106 , MSPM0G1107 , MSPM0G1505 , MSPM0G1506 , MSPM0G1507 , MSPM0G3105 , MSPM0G3106 , MSPM0G3107 , MSPM0G3505 , MSPM0G3506 , MSPM0G3507

 

  1.   Abstract
  2.   Trademarks
  3. 1Overview
  4. 2Low-Power Features in PMCU
    1. 2.1 Overview
      1. 2.1.1 Power Domains and Power Modes
      2. 2.1.2 Power Management (PMU)
        1. 2.1.2.1 Supply Supervisors
        2. 2.1.2.2 Peripheral Power Control
        3. 2.1.2.3 VBOOST for Analog Muxes
      3. 2.1.3 Clock Module (CKM)
        1. 2.1.3.1 Oscillators
        2. 2.1.3.2 Clocks
      4. 2.1.4 System Controller (SYSCTL)
        1. 2.1.4.1 Asynchronous Fast Clock Requests
        2. 2.1.4.2 Shutdown Mode Handling
  5. 3Low-Power Optimization
    1. 3.1 Low-Power Basics
    2. 3.2 MSPM0 Low-Power Feature Use
      1. 3.2.1 Low-Power Modes
      2. 3.2.2 System Clock and Peripheral Operation Frequency
      3. 3.2.3 I/O Configuration
      4. 3.2.4 Event Manager
      5. 3.2.5 Analog Peripheral Low-Power Features
      6. 3.2.6 Run Code From RAM
    3. 3.3 Software Coding Strategies
    4. 3.4 Hardware Design Strategies
  6. 4Power Consumption Measurement and Evaluation
    1. 4.1 Current Evaluation
    2. 4.2 Current Measurement
      1. 4.2.1 Current Measurement

3.2.3 I/O Configuration

I/O setting is the most common problem causing unexpected high-power consumption.

For unused pins, the IOMUX configuration should remain in the default (high-Z) state.

For the digital input pin used, please pay attention to the internal pull-up or pull-down resistor. If the input voltage is incompatible, leakage current will be caused. When the input voltage is VCC or VSS, the digital input pin consumes the least power. If the voltage is between VCC or VSS, the internal MOSFET will be biased in the linear region and will consume a lot of power. This usually occurs when unused digital input pins float.

For the digital output pin used, when entering low-power mode, please pay attention that the last valid IO output state may be latched, if no further inversion control. It may cause the additional power consumption.