SDAA018 December   2025 MSPM0H3216

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 MSPM0H Hardware Design Check List
  5. 2 Power Supplies in MSPM0H Devices
    1. 2.1 Digital Power Supply
    2. 2.2 Analog Power Supply
    3. 2.3 Built-in Power Supply and Voltage Reference
    4. 2.4 Recommended Decoupling Circuit for Power Supply
  6. 3 Reset and Power Supply Supervisor
    1. 3.1 Digital Power Supply
    2. 3.2 Power Supply Supervisor
  7. 4 Clock System
    1. 4.1 Internal Oscillators
    2. 4.2 External Oscillators
    3. 4.3 External Clock Output (CLK_OUT)
    4. 4.4 Frequency Clock Counter (FCC)
  8. 5 Debugger
    1. 5.1 Debug Port Pins and Pinout
    2. 5.2 Debug Port Connection With Standard JTAG Connector
  9. 6 Key Analog Peripherals
    1. 6.1 ADC Design Considerations
  10. 7 Key Digital Peripherals
    1. 7.1 Timer Resources and Design Considerations
    2. 7.2 UART and LIN Resources and Design Considerations
    3. 7.3 I2C and SPI Design Considerations
  11. 8 GPIOs
    1. 8.1 GPIO Output Switching Speed and Load Capacitance
    2. 8.2 GPIO Current Sink and Source
    3. 8.3 High-Speed GPIOs (HSIO)
    4. 8.4 Communicate With a 1.8V/3.3V Device Without a Level Shifter
    5. 8.5 Unused Pins Connection
  12. 9 Layout Guides
    1. 9.1 Power Supply Layout
    2. 9.2 Considerations for Ground Layout
    3. 9.3 Traces, Vias, and Other PCB Components
    4. 9.4 How to Select Board Layers and Recommended Stack-up
  13. 10Summary
  14. 11References

3.1 Digital Power Supply

The device has five reset levels:

  • Power-on reset (POR)
  • Brownout reset (BOR)
  • Boot reset (BOOTRST)
  • System reset (SYSRST)
  • CPU reset (CPURST)

The details of the relationships between reset levels is described in the MSPM0 H-Series 32MHz Microcontrollers Technical Reference Manual (TRM).

After a cold start, the NRST pin is configured in NRST mode. The NRST pin must be high for the device to boot successfully. There is no internal pullup resistor on NRST. External circuitry (either a pullup resistor to DVCC or a reset control circuit) must actively pull NRST high for the device to start. A capacitor and an open button are needed for manual reset (see Figure 3-1). After the device is started, a low pulse on NRST that is <1 second in duration triggers a BOOTRST. If a low pulse on NRST longer than 1 second triggers a POR.

NRST Recommended CircuitFigure 3-1 NRST Recommended Circuit