SLAAE76C March   2023  – May 2025 MSPM0G1105 , MSPM0G1106 , MSPM0G1107 , MSPM0G1505 , MSPM0G1506 , MSPM0G1507 , MSPM0G3105 , MSPM0G3106 , MSPM0G3107 , MSPM0G3505 , MSPM0G3506 , MSPM0G3507

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 MSPM0G Hardware Design Check List
  5. 2 Power Supplies in MSPM0G 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
    2. 6.2 OPA Design Considerations
    3. 6.3 DAC Design Considerations
    4. 6.4 COMP Design Considerations
    5. 6.5 GPAMP 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 MCAN Design Considerations
    4. 7.4 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 High-Drive GPIOs (HDIO)
    5. 8.5 Open-Drain GPIOs Enable 5V Communication Without a Level Shifter
    6. 8.6 Communicate With a 1.8V Device Without a Level Shifter
    7. 8.7 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. 10Bootloader
    1. 10.1 Bootloader Introduction
    2. 10.2 Bootloader Hardware Design Considerations
      1. 10.2.1 Physical Communication interfaces
      2. 10.2.2 Hardware Invocation
  14. 11Summary
  15. 12References
  16. 13Revision History

4.1 Internal Oscillators

Internal Low-Frequency Oscillator (LFOSC)

LFOSC is an on-chip low power oscillator that is factory trimmed to a frequency of 32.768kHz. This provides a low-frequency clock that can be used to help the system achieve low power consumption. The LFOSC can provide higher accuracy when used over a reduced temperature range. See the device-specific data sheet for details.

MSPM0G Series LFOSC Figure 4-1 MSPM0G Series LFOSC

Internal System Oscillator (SYSOSC)

SYSOSC is an on-chip, accurate, and configurable oscillator with factory-trimmed frequencies of 32MHz (base frequency) and 4MHz (low frequency), as well as support for user-trimmed operation at either 24MHz or 16MHz. This provides a high frequency clock that allows the CPU to run at high speed for executing code and processing performance.

MSPM0G Series SYSOSC Figure 4-2 MSPM0G Series SYSOSC

SYSOSC Frequency Correction Loop

The additional hardware setting for this oscillator is an external resistor, populated between the ROSC pin and VSS, to increase SYSOSC from a base accuracy of ±2.5% across temperature.

The overall SYSOSC application accuracy is determined by combining the following error sources to determine the total error:

  1. The ROSC reference resistor error (due to tolerance and temperature drift).
  2. The SYSOSC circuit error in FCL mode (±0.75% for -40°C to 85°C or ±0.90% for -40°C to 125°C).

Table 4-1 shows how to calculate the SYSOSC application accuracy for two different ROSC resistor specs across two temperature ranges. For more details, see the device-specific TRM.

Table 4-1 SYSOSC Accuracy With FCL, by ROSC Tolerance, RSOC TCR, and Ambient Temperature (TA)
Ambient Temperature (TA) -40 ≤ TA ≤ 125°C -40 ≤ TA ≤ 85°C
ROSC Resistor Parameters ±0.1% 25 ppm/°C ±0.5% 25 ppm/°C ±0.1% 25 ppm/°C ±0.5% 25 ppm/°C
Nominal ROSC resistance (ROSCnom) 100kΩ
Maximum ROSC resistance (at 25°C) 100.1kΩ 100.5kΩ 100.1kΩ 100.5kΩ
Minimum ROSC resistance (at 25°C) 99.9kΩ 99.5kΩ 99.9kΩ 99.5kΩ
ROSC resistor TCR 25ppm/°C
ROSC temperature drift -0.16% to 0.25% -0.16% to 0.15%
Maximum ROSC resistance (at high temperature) (ROSCmax) 100.35kΩ 100.75kΩ 100.25kΩ 100.65kΩ
Minimum ROSC resistance (at low temperature) (ROSCmin) 99.74kΩ 99.34kΩ 99.74kΩ 99.34kΩ
ROSC resistance error (high temperature) (ROSCerr+) +0.35% +0.75% + 0.25% +0.65%
ROSC resistance error (low temperature) (ROSCerr-) -0.26% -0.66% -0.26% -0.66%
SYSOSC circuit error (SYSOSCerr) ±0.9% ±0.75%
Total accuracy (TOTerr-, TOTerr+) -1.2% to +1.3% -1.6% to +1.7% -1.0% to +1.0% -1.4% to +1.4%

System Phase-Locked Loop (SYSPLL)

SYSPLL is the system phase-locked loop with programmable frequency and is used to achieve the MSPM0G series highest speed (80MHz).

MSPM0G SYSPLL Circuit Figure 4-3 MSPM0G SYSPLL Circuit