SLAU929A April   2024  – June 2025 MSPM0C1104 , MSPM0G3505 , MSPM0G3506 , MSPM0G3507 , MSPM0H3216 , MSPM0L1105 , MSPM0L1227 , MSPM0L1227-Q1 , MSPM0L1228 , MSPM0L1228-Q1 , MSPM0L1304 , MSPM0L1305 , MSPM0L1306 , MSPM0L2227 , MSPM0L2227-Q1 , 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
  10. 7Revision History

4.2 Universal Asynchronous Receiver-Transmitter (UART)

Microchip's 8-bit MCUs and MSPM0 both offer peripherals to perform asynchronous (clockless) communication. In MSPM0 these UART peripherals come in two variants, one with standard features and one with advanced features. In Microchip's devices, the UART comes in one singular version. Table 4-2 shows a comparison of MSPM0's UART against Microchip's ATtiny and ATmega UARTs.

Table 4-2 UART Feature Set Comparison
Feature

ATmega

ATtiny

MSPM0
Hardware flow control

No

No

Yes
Continuous communication using DMA

No

No

Yes
Multiprocessor

No

No

Yes
Synchronous mode

Yes

Yes

No
Single-wire half duplex communication

Yes

Yes

Yes(1)
Wakeup from low-power mode

Yes

YesYes
Data length

5,6,7,8,9

5,6,7,8,95, 6, 7, 8
Tx/Rx FIFO Depth

2

N/A4
IrDA Support

No

Yes

Extended UART only

LIN Support

Client support on ATmega48/88 only

Client support

Extended UART only

DALI Support

No

No

Extended UART only

Manchester Code Support

No

No

Extended UART only

(1) Requires reconfiguration of the peripheral between transmission and reception

UART code examples

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