SLAAE56A November   2022  – March 2023 MSPM0G1105 , MSPM0G1106 , MSPM0G1107 , MSPM0G1505 , MSPM0G1506 , MSPM0G1507 , MSPM0G3105 , MSPM0G3106 , MSPM0G3107 , MSPM0G3505 , MSPM0G3506 , MSPM0G3507 , MSPM0L1105 , MSPM0L1106 , MSPM0L1303 , MSPM0L1304 , MSPM0L1304-Q1 , MSPM0L1305 , MSPM0L1305-Q1 , MSPM0L1306 , MSPM0L1306-Q1 , MSPM0L1343 , MSPM0L1344 , MSPM0L1345 , MSPM0L1346

 

  1.   Abstract
  2.   Trademarks
  3. 1MSPM0 Portfolio Overview
    1. 1.1 Introduction
    2. 1.2 Portfolio Comparison of STM32 MCUs to MSPM0 MCUs
  4. 2Ecosystem and Migration
    1. 2.1 Software Ecosystem Comparison
      1. 2.1.1 MSPM0 Software Development Kit (MSPM0 SDK)
      2. 2.1.2 CubeIDE vs Code Composer Studio IDE (CCS)
      3. 2.1.3 CubeMX vs SysConfig
    2. 2.2 Hardware Ecosystem
    3. 2.3 Debug Tools
    4. 2.4 Migration Process
    5. 2.5 Migration and Porting Example
  5. 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
      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
    6. 3.6 Interrupt and Events Comparison
    7. 3.7 Debug and Programming Comparison
  6. 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)
  7. 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)
  8. 6Revision History

5.5 Voltage References (VREF)

The STM32G0x and MSPM0 both have internal references which can be used to supply a reference voltage to internal peripherals and output to external peripherals.

Table 5-6 Feature Set Comparison
FeatureSTM32G0MSPM0GMSPM0L
Internal Reference (V)2.048, 2.51.4, 2.51.4, 2.5
External Reference (V)When VDD < 2, VREF = VDDExternal: 1.4 ≤ VREF ≤ VDDExternal: 1.4 ≤ VREF ≤ VDD
When VDD ≥ 2, 2 ≤ VREF ≤ VDD
Output Internal ReferenceYesYesYes
Internally Connect to ADCYesYesYes
Internally Connect to DACYesYesNo
Internally Connect to COMPNoYesNo
Internally Connect to OPAN/AYesNo
Table 5-7 Control Bit Comparison
STM32G0x VREFBUF BitsMSPM0 Equivalent
VREFBUF Bit3 (VRR)CTL1 Bit0 (READY)
VREFBUF Bit2 (VRS)CTL0 Bit7 (BUFCONFIG)
VREFBUF Bit1 (HIZ)N/A
VREFBUF Bit0 (ENVR)CTL0 Bit0 (ENABLE)
For sample and hold mode: CTL0 Bit8 (SHMODE)

For the MSPM0 VREF, you must enable the power bit, PWREN Bit0 (ENABLE).

VREF code examples

Code examples that use VREF can be found in the MSPM0 SDK examples guide.