SLASF94A May   2024  – October 2024 MSPM0L1227 , MSPM0L1228 , MSPM0L2227 , MSPM0L2228

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Functional Block Diagram
  6. 5 Device Comparison
    1. 5.1 Device Comparison Chart
  7. 6 Pin Configuration and Functions
    1. 6.1 Pin Diagrams
    2. 6.2 Pin Attributes
      1.      11
    3. 6.3 Signal Descriptions
      1.      13
      2.      14
      3.      15
      4.      16
      5.      17
      6.      18
      7.      19
      8.      20
      9.      21
      10.      22
      11.      23
      12.      24
      13.      25
      14.      26
      15.      27
      16.      28
      17.      29
    4. 6.4 Connections for Unused Pins
  8. 7 Specifications
    1. 7.1  Absolute Maximum Ratings
    2. 7.2  ESD Ratings
    3. 7.3  Recommended Operating Conditions
    4. 7.4  Thermal Information
    5. 7.5  Supply Current Characteristics
      1. 7.5.1 RUN/SLEEP Modes
      2. 7.5.2 STOP/STANDBY Modes
      3. 7.5.3 SHUTDOWN Mode
    6. 7.6  Power Supply Sequencing
      1. 7.6.1 Power Supply Ramp
      2. 7.6.2 POR and BOR
    7. 7.7  VBat Characteristics
    8. 7.8  Flash Memory Characteristics
    9. 7.9  Timing Characteristics
    10. 7.10 Clock Specifications
      1. 7.10.1 System Oscillator (SYSOSC)
      2. 7.10.2 Low Frequency Oscillator (LFOSC)
      3. 7.10.3 Low Frequency Crystal/Clock
      4. 7.10.4 High Frequency Crystal/Clock
    11. 7.11 Digital IO
      1. 7.11.1 Electrical Characteristics
      2. 7.11.2 Switching Characteristics
    12. 7.12 Analog Mux VBOOST
    13. 7.13 ADC
      1. 7.13.1 Electrical Characteristics
      2. 7.13.2 Switching Characteristics
      3. 7.13.3 Linearity Parameters
      4. 7.13.4 Typical Connection Diagram
    14. 7.14 Temperature Sensor
    15. 7.15 VREF
      1. 7.15.1 Electrical Characteristics ADC
      2. 7.15.2 Electrical Characteristics (Comparator)
      3. 7.15.3 Voltage Characterisitcs (ADC)
      4. 7.15.4 Voltage Characterisitcs (Comparator)
    16. 7.16 Comparator (COMP)
      1. 7.16.1 Comparator Electrical Characteristics
    17. 7.17 LCD
    18. 7.18 I2C
      1. 7.18.1 I2C Characteristics
      2. 7.18.2 I2C Filter
      3. 7.18.3 I2C Timing Diagram
    19. 7.19 SPI
      1. 7.19.1 SPI
      2. 7.19.2 SPI Timing Diagram
    20. 7.20 UART
    21. 7.21 TIMx
    22. 7.22 TRNG
      1. 7.22.1 TRNG Electrical Characteristics
      2. 7.22.2 TRNG Switching Characteristics
    23. 7.23 Emulation and Debug
      1. 7.23.1 SWD Timing
  9. 8 Detailed Description
    1. 8.1  Functional Block Diagram
    2. 8.2  CPU
    3. 8.3  Operating Modes
      1. 8.3.1 Functionality by Operating Mode (MSPM0Lx22x)
    4. 8.4  Security
    5. 8.5  Power Management Unit (PMU)
    6. 8.6  Clock Module (CKM)
    7. 8.7  DMA
    8. 8.8  Events
    9. 8.9  Memory
      1. 8.9.1 Memory Organization
      2. 8.9.2 Peripheral File Map
      3. 8.9.3 Peripheral Interrupt Vector
    10. 8.10 Flash Memory
    11. 8.11 SRAM
    12. 8.12 GPIO
    13. 8.13 IOMUX
    14. 8.14 ADC
    15. 8.15 Temperature Sensor
    16. 8.16 LFSS
    17. 8.17 VREF
    18. 8.18 COMP
    19. 8.19 TRNG
    20. 8.20 AESADV
    21. 8.21 Keystore
    22. 8.22 CRC
    23. 8.23 UART
    24. 8.24 I2C
    25. 8.25 SPI
    26. 8.26 IWDT
    27. 8.27 WWDT
    28. 8.28 RTC_A
    29. 8.29 Timers (TIMx)
    30. 8.30 LCD
    31. 8.31 Device Analog Connections
    32. 8.32 Input/Output Diagrams
    33. 8.33 Serial Wire Debug Interface
    34. 8.34 Bootstrap Loader (BSL)
    35. 8.35 Device Factory Constants
    36. 8.36 Identification
  10. 9 Applications, Implementation, and Layout
    1. 9.1 Typical Application
      1. 9.1.1 Schematic
  11. 10Device and Documentation Support
    1. 10.1 Getting Started and Next Steps
    2. 10.2 Device Nomenclature
    3. 10.3 Tools and Software
    4. 10.4 Documentation Support
    5. 10.5 Support Resources
    6. 10.6 Trademarks
    7. 10.7 Electrostatic Discharge Caution
    8. 10.8 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

8.28 RTC_A

The RTC_A instance of the real-time clock operates off of a 32kHz input clock source (typically a low frequency crystal) and provides a time base to the application with multiple options for interrupts to the CPU. RTC_A provides common key features in relation to the Low-Frequency Subsystem (LFSS).

Common key features of RTC_A include:

  • Counters for seconds, minutes, hours, day of the week, day of the month, month, and year
  • Binary or BCD format
  • Leap-year handling
  • One customizable alarm interrupt based on minute, hour, day of the week, and day of the month
  • Interval alarm interrupt to wake every minute, every hour, at midnight, or at noon
  • Interval alarm interrupt providing periodic wake-up at 4096, 2048, 1024, 512, 256, or 128Hz
  • Interval alarm interrupt providing periodic wake-up at 64, 32, 16, 8, 4, 2, 1, and 0.5Hz
  • Calibration for crystal offset error (up to ±240ppm)
  • Compensation for temperature drift (up to ±240ppm)
  • RTC clock output to pin for calibration
  • Three bit prescaler for heartbeat function with interrupt generation
  • RTC external clock selection of untrimmed 32kHz, trimmed 512Hz, 256Hz, or 1Hz
  • RTC time stamp capture upon detection of a timer stamp event, including tamper (TIO) event and VDD fail event
  • RTC counter lock function

Table 8-10 shows the RTC features supported in this device.

Table 8-10 RTC Instances and Key Features
RTC Features RTC_A
Power enable register -
Real-time clock and calendar mode providing seconds, minutes, hours, day of week, day of month, and year Yes
Selectable binary or binary-coded decimal (BCD) format Yes
Leap-year correction (valid for year 1901 through 2099) Yes
Two customizable calendar alarm interrupts based on minute, hour, day of the week, and day of the month Yes
Interval alarm interrupt to wake every minute, every hour, at midnight, or at noon Yes
Periodic interrupt to wake at 4096, 2048, 1024, 512, 256, or 128Hz Yes
Periodic interrupt to wake at 64, 32, 16, 8, 4, 2, 1, and 0.5Hz Yes
Interrupt capability down to STANDBY mode with STOPCLKSTBY Yes
Calibration for crystal offset error and crystal temperature drift (up to ±240ppm total) Yes
RTC clock output to pin for calibration (GPIO) Yes
RTC clock output to pin for calibration (TIO) Yes
Three bit prescaler for heartbeat function with interrupt generation Yes
RTC external clock selection of untrimmed 32kHz, trimmed 512Hz, 256Hz or 1Hz Yes
RTC time stamp capture upon detection of a timer stamp event, including:
  • TIO event
  • VDD fail event
 Yes
RTC counter lock function Yes

For more details, see the RTC chapter of the MSPM0 L-Series 32MHz Microcontrollers Technical Reference Manual`.