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

8.34 Bootstrap Loader (BSL)

The bootstrap loader (BSL) enables configuration of the device as well as programming of the device memory through a UART or I2C serial interface. Access to the device memory and configuration through the BSL is protected by a 256-bit user-defined password, and it is possible to completely disable the BSL in the device configuration, if desired. The BSL is enabled by default from TI to support use of the BSL for production programming.

A minimum of two pins are required to use the BSL: the BSLRX and BSLTX signals (for UART), or the BSLSCL and BSLSDA signals (for I2C). Additionally, one or two additional pins (BSL_invoke and NRST) may be used for controlled invocation of the bootloader by an external host.

If enabled, the BSL may be invoked (started) in the following ways:

  • The BSL is invoked during the boot process if the BSL_invoke pin state matches the defined BSL_invoke logic level. If the device fast boot mode is enabled, this invocation check is skipped. An external host can force the device into the BSL by asserting the invoke condition and applying a reset pulse to the NRST pin to trigger a BOOTRST, after which the device will verify the invoke condition during the reboot process and start the BSL if the invoke condition matches the expected logic level.
  • The BSL is automatically invoked during the boot process if the reset vector and stack pointer are left unprogrammed. As a result, a blank device from TI will invoke the BSL during the boot process without any need to provide a hardware invoke condition on the BSL_invoke pin. This enables production programming using just the serial interface signals.
  • The BSL may be invoked at runtime from application software by issuing a SYSRST with BSL entry command.
Table 8-14 BSL Pin Requirements and Functions
DEVICE SIGNALCONNECTIONBSL FUNCTION
BSLRXRequired for UARTUART receive signal (RXD), an input
BSLTXRequired for UARTUART transmit signal (TXD) an output
BSLSCLRequired for I2CI2C BSL clock signal (SCL)
BSLSDARequired for I2CI2C BSL data signal (SDA)
BSL_invokeOptionalActive-high digital input used to start the BSL during boot
NRSTOptionalActive-low reset pin used to trigger a reset and subsequent check of the invoke signal (BSL_invoke)

For a complete description of the BSL functionality and command set, see the MSPM0 boot strap loader user's guide.