SLAAE72 December   2022 MSPM0L1105 , MSPM0L1106 , MSPM0L1227 , MSPM0L1227-Q1 , MSPM0L1228 , MSPM0L1228-Q1 , MSPM0L1303 , MSPM0L1304 , MSPM0L1304-Q1 , MSPM0L1305 , MSPM0L1305-Q1 , MSPM0L1306 , MSPM0L1306-Q1 , MSPM0L1343 , MSPM0L1344 , MSPM0L1345 , MSPM0L1346 , MSPM0L2227 , MSPM0L2227-Q1 , MSPM0L2228 , MSPM0L2228-Q1

 

  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. 2.2 Power Management (PMU)
      1. 2.2.1 Supply Supervisors
      2. 2.2.2 Peripheral Power Control
      3. 2.2.3 VBOOST for Analog Muxes
    3. 2.3 Clock Module (CKM)
      1. 2.3.1 Oscillators
      2. 2.3.2 Clocks
      3. 2.3.3 Asynchronous Fast Clock Requests
      4. 2.3.4 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

2.3.2 Clocks

The CKM takes oscillator outputs and generates a variety of functional clocks for use by the device. Different oscillator clock source paired with clocks help meet different low-power requirement (see Table 2-3). Users can select clock with suitable clock range for different peripherals.

Table 2-3 Clocks
Clock Name Frequency Range Source Direction
CPUCLK 32 kHz to 32 MHz LFCLK, SYSOSC CPU
MCLK PD1
ULPCLK 32 kHz to 32 MHz PD0
SYSOSC 4 to 32 MHz SYSOSC PD1, PD0
MFCLK 4 MHz SYSOSC PD1, PD0
LFCLK 32 kHz LFCLK PD1, PD0
MFPCLK 4 MHz SYSOSC PD1, PD0
LFCLK 32 kHz LFCLK PD1, PD0
RTCCLK RTC