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

2.1.3.1 Oscillators

There are two types of oscillators in the system. Internal oscillators can give a low-cost feature. External oscillator can give a high-performance feature. For the oscillators with low frequency, they are mostly used to help the system reach low power.

The internal oscillators are:

  • LFOSC: low-frequency oscillator (32-kHz typical frequency)

  • SYSOSC: system oscillator (4- or 32-MHz factory-trimmed frequencies, 16- or 24-MHz user-trimmed frequencies) with one clock cycle gear shift ability

  • SYSPLL: system PLL with programmable frequency, up to 80 MHz

The external oscillators are:

  • LFXT: low-frequency low-power crystal oscillator (32-kHz typical frequency)

  • HFXT: high-frequency crystal oscillator (4- to 48-MHz typical frequency)

In addition to the oscillators, low frequency (LFCLK_IN) and high frequency (HFCLK_IN) digital clock inputs are provided to support cases where the LFXT or HFXT is not used.