SLAU929 April   2024 MSPM0C1104 , MSPM0G3505 , MSPM0G3506 , MSPM0G3507 , MSPM0L1105 , MSPM0L1227 , MSPM0L1228 , MSPM0L1228-Q1 , MSPM0L1304 , MSPM0L1305 , MSPM0L1306 , MSPM0L2227 , MSPM0L2228 , MSPM0L2228-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1MSPM0 Portfolio Overview
    1. 1.1 Introduction
    2. 1.2 Portfolio Comparison of Microchip AVR ATmega and ATiny MCUs to MSPM0
  5. 2Ecosystem and Migration
    1. 2.1 Software Ecosystem Comparison
      1. 2.1.1 MSPM0 Software Development Kit (MSPM0 SDK)
      2. 2.1.2 MPLAB X IDE vs Code Composer Studio IDE (CCS)
      3. 2.1.3 MPLAB Code Configurator vs SysConfig
    2. 2.2 Hardware Ecosystem
    3. 2.3 Debug Tools
    4. 2.4 Migration Process
    5. 2.5 Migration and Porting Example
  6. 3Core Architecture Comparison
    1. 3.1 CPU
    2. 3.2 Embedded Memory Comparison
      1. 3.2.1 Flash Features
      2. 3.2.2 Flash Organization
        1. 3.2.2.1 Memory Banks
        2. 3.2.2.2 Flash Memory Regions
        3. 3.2.2.3 NONMAIN Memory
      3. 3.2.3 Embedded SRAM
    3. 3.3 Power Up and Reset Summary and Comparison
    4. 3.4 Clocks Summary and Comparison
    5. 3.5 MSPM0 Operating Modes Summary and Comparison
      1. 3.5.1 Operating Modes Comparison
      2. 3.5.2 MSPM0 Capabilities in Lower Power Modes
      3. 3.5.3 Entering Lower-Power Modes
    6. 3.6 Interrupt and Events Comparison
      1. 3.6.1 Interrupts and Exceptions
      2. 3.6.2 Event Handler and EXTI (Extended Interrupt and Event Controller)
    7. 3.7 Debug and Programming Comparison
      1. 3.7.1 Bootstrap Loader (BSL) Programming Options
  7. 4Digital Peripheral Comparison
    1. 4.1 General-Purpose I/O (GPIO, IOMUX)
    2. 4.2 Universal Asynchronous Receiver-Transmitter (UART)
    3. 4.3 Serial Peripheral Interface (SPI)
    4. 4.4 I2C
    5. 4.5 Timers (TIMGx, TIMAx)
    6. 4.6 Windowed Watchdog Timer (WWDT)
    7. 4.7 Real-Time Clock (RTC)
  8. 5Analog Peripheral Comparison
    1. 5.1 Analog-to-Digital Converter (ADC)
    2. 5.2 Comparator (COMP)
    3. 5.3 Digital-to-Analog Converter (DAC)
    4. 5.4 Operational Amplifier (OPA)
    5. 5.5 Voltage References (VREF)
  9. 6References

3.4 Clocks Summary and Comparison

Microchip's 8-bit AVR MCUs and MSPM0 both contain internal oscillators that source primary clocks. The clocks can be divided to source other clocks and be distributed across the multitude of peripherals.

Table 3-7 Oscillator Comparisons
ATMega ATtiny MSPM0
Calibrated Internal RC 8MHz OSC20M SYSOSC(1)
Full Swing Crystal N/A HFXT
External External HFCLK_IN (Digital Clock)
Internal 128kHz RC OSCULP32K LFOSC -32kHz
Low Frequency Crystal XOSC32K LFXT - 32kHz
N/A N/A LFCLK_IN
Low Power Crystal N/A LFXT - 32kHz
(1) SYSOSC is programmable to be 32MHz, 24MHz, 16MHz, or 4MHz.
Table 3-8 Clock Comparison
ATmega ATtiny MSPM0G MSPM0L/C
N/A OSC20M SYSOSC

SYSOSC
N/A N/A SYSPLLCLK1 N/A
N/A N/A SYSPLLCLK0 N/A
N/A N/A SYSPLLCLK2x(1) N/A
CLK_cpu CLK_CPU BUSCLK(2) BUSCLK(2)
CLK_cpu

CLK_CPU

 BUSCLK(2) BUSCLK(2)
CLK_flash CLK_CPU BUSCLK(2) BUSCLK(2)
CLK_adc CLK_PER SYSOSC/ULPCLK/HFCLK SYSOSC/ULPCLK/HFCLK
CLK_io

CLK_PER

 BUSCLK(2) BUSCLK(2)
CLK_async CLK_RTC LFCLK N/A
(1) SYSPLLCLK2x is twice the speed of the output of the PLL module and can be divided down.
(2) BUSCLK depends on the Power Domain. For Power Domain 0, BUSCLK is ULPCLK. For Power Domain 1, BUSCLK is MCLK.
Table 3-9 Peripheral Clock Sources
Peripheral ATmega ATtiny Series MSPM0G MSPM0L/C
RTC CLK_async CLK_RTC LFCLK (LFOSC, LFXT) N/A
UART CLK_io CLK_PER BUSCLK, ULPCLK,MFCLK, LFCLK BUSCLK, ULPCLK,MFCLK, LFCLK
SPI CLK_io CLK_PER BUSCLK, MFCLK, LFCLK BUSCLK, ULPCLK,MFCLK, LFCLK
I2C CLK_io CLK_PER BUSCLK, MFCLK BUSCLK, ULPCLK,MFCLK, LFCLK
ADC CLK_adc CLK_PER ULPCLK, HFCLK, SYSOSC SYSOSC/ ULPCLK
TIMERS CLK_io CLK_PER BUSCLK, MFCLK, LFCLK BUSCLK, ULPCLK,MFCLK, LFCLK
LPTIM 1/2 (TIMG0/1) CLK_async CLK_PER LFCLK, ULPCLK, LFCLK_IN LFCLK

The device-specific TRM for each family has a clock tree to help visualize the clock system. Sysconfig can assist with the options for clock division and sourcing for peripherals.