SLAU929 April   2024 MSPM0C1104 , MSPM0G3505 , MSPM0G3506 , MSPM0G3507 , MSPM0L1105 , MSPM0L1227 , MSPM0L1227-Q1 , 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

4.4 I2C

MSPM0 and Microchip 8-bit MCUs both support I2C. In MSPM0, the I2C functionality is handled by the I2C module. In Microchip devices, this is slightly different. In ATmega169/329 devices, I2C is handled by the Universal Serial Interface. In the ATmega48/88, it is managed by the 2-Wire Serial Interface. In the ATtiny, the two wire interface or TWI handles I2C communications.

Table 4-4 I2C Feature Comparison
Feature ATmega ATtiny MSPM0
Controller and target modes Yes Yes Yes
Multi-controller capability Yes Yes Yes
Standard-mode (up to 100 kHz) Yes Yes Yes
Fast-mode (up to 400 kHz) Yes Yes Yes
Fast-mode Plus (up to 1 MHz) No Yes Yes
Addressing mode 7 bit 7 or 10 bit 7 or 10 bit
Peripheral addresses 1 Address 1 Address 2 addresses
General call No for ATmega 169/329, yes for ATmega48/88 Yes Yes
Programmable setup and hold times No No No
Event management No No Yes
Clock stretching No for ATmega169/329, yes for ATmega48/88 Yes Yes
Software reset Yes Yes Yes
FIFO/Buffer No No TX: 8 byte
RX: 8 byte
DMA No No Yes
Programmable analog and digital noise filters

N/A for Atmega169/329, Input filter not programmable for ATmega48/88

 Input filter not programmable Yes

I2C code examples

Information about I2C code examples can be found in the MSPM0 SDK examples guide.