SLAU846A June   2023  – October 2023 MSPM0G1105 , MSPM0G1106 , MSPM0G1107 , MSPM0G1505 , MSPM0G1506 , MSPM0G1507 , MSPM0G3105 , MSPM0G3105-Q1 , MSPM0G3106 , MSPM0G3106-Q1 , MSPM0G3107 , MSPM0G3107-Q1 , MSPM0G3505 , MSPM0G3505-Q1 , MSPM0G3506 , MSPM0G3506-Q1 , MSPM0G3507 , MSPM0G3507-Q1

 

  1.   1
  2.   Read This First
    1.     About This Manual
    2.     Notational Conventions
    3.     Glossary
    4.     Support Resources
    5.     Trademarks
  3. 1 Architecture
    1. 1.1 Architecture Overview
    2. 1.2 Bus Organization
    3. 1.3 Platform Memory Map
      1. 1.3.1 Code Region
      2. 1.3.2 SRAM Region
      3. 1.3.3 Peripheral Region
      4. 1.3.4 Subsystem Region
      5. 1.3.5 System PPB Region
    4. 1.4 Boot Configuration
      1. 1.4.1 Configuration Memory (NONMAIN)
        1. 1.4.1.1 CRC-Backed Configuration Data
        2. 1.4.1.2 16-bit Pattern Match for Critical Fields
      2. 1.4.2 Boot Configuration Routine (BCR)
        1. 1.4.2.1 Serial Wire Debug Related Policies
          1. 1.4.2.1.1 SWD Security Level 0
          2. 1.4.2.1.2 SWD Security Level 1
          3. 1.4.2.1.3 SWD Security Level 2
        2. 1.4.2.2 SWD Mass Erase and Factory Reset Commands
        3. 1.4.2.3 Flash Memory Protection and Integrity Related Policies
          1. 1.4.2.3.1 Locking the Application (MAIN) Flash Memory
          2. 1.4.2.3.2 Locking the Configuration (NONMAIN) Flash Memory
          3. 1.4.2.3.3 Static Write Protection NONMAIN Fields
        4. 1.4.2.4 Application CRC Verification
        5. 1.4.2.5 Fast Boot
        6. 1.4.2.6 Bootstrap Loader (BSL) Enable/Disable Policy
          1. 1.4.2.6.1 BSL Enable
      3. 1.4.3 Bootstrap Loader (BSL)
        1. 1.4.3.1 GPIO Invoke
        2. 1.4.3.2 Bootstrap Loader (BSL) Security Policies
          1. 1.4.3.2.1 BSL Access Password
          2. 1.4.3.2.2 BSL Read-out Policy
          3. 1.4.3.2.3 BSL Security Alert Policy
        3. 1.4.3.3 Application Version
        4. 1.4.3.4 BSL Triggered Mass Erase and Factory Reset
    5. 1.5 NONMAIN Registers
    6. 1.6 Factory Constants
      1. 1.6.1 FACTORYREGION Registers
  4. 2 PMCU
    1. 2.1 PMCU Overview
      1. 2.1.1 Power Domains
      2. 2.1.2 Operating Modes
        1. 2.1.2.1 RUN Mode
        2. 2.1.2.2 SLEEP Mode
        3. 2.1.2.3 STOP Mode
        4. 2.1.2.4 STANDBY Mode
        5. 2.1.2.5 SHUTDOWN Mode
        6. 2.1.2.6 Supported Functionality by Operating Mode
        7. 2.1.2.7 Suspended Low Power Mode Operation
    2. 2.2 Power Management (PMU)
      1. 2.2.1 Power Supply
      2. 2.2.2 Core Regulator
      3. 2.2.3 Supply Supervisors
        1. 2.2.3.1 Power-on Reset (POR) Supervisor
        2. 2.2.3.2 Brownout Reset (BOR) Supervisor
        3. 2.2.3.3 POR and BOR Behavior During Supply Changes
      4. 2.2.4 Bandgap Reference
      5. 2.2.5 Temperature Sensor
      6. 2.2.6 VBOOST for Analog Muxes
      7. 2.2.7 Peripheral Power Enable Control
        1. 2.2.7.1 Automatic Peripheral Disable in Low Power Modes
    3. 2.3 Clock Module (CKM)
      1. 2.3.1 Oscillators
        1. 2.3.1.1 Internal Low-Frequency Oscillator (LFOSC)
        2. 2.3.1.2 Internal System Oscillator (SYSOSC)
          1. 2.3.1.2.1 SYSOSC Gear Shift
          2. 2.3.1.2.2 SYSOSC Frequency and User Trims
          3. 2.3.1.2.3 SYSOSC Frequency Correction Loop
            1. 2.3.1.2.3.1 SYSOSC FCL in External Resistor Mode (ROSC)
            2. 2.3.1.2.3.2 SYSOSC FCL in Internal Resistor Mode
          4. 2.3.1.2.4 SYSOSC User Trim Procedure
          5. 2.3.1.2.5 Disabling SYSOSC
        3. 2.3.1.3 System Phase-Locked Loop (SYSPLL)
          1. 2.3.1.3.1 Configuring SYSPLL Output Frequencies
          2. 2.3.1.3.2 Loading SYSPLL Lookup Parameters
          3. 2.3.1.3.3 SYSPLL Startup Time
        4. 2.3.1.4 Low Frequency Crystal Oscillator (LFXT)
        5. 2.3.1.5 LFCLK_IN (Digital Clock)
        6. 2.3.1.6 High Frequency Crystal Oscillator (HFXT)
        7. 2.3.1.7 HFCLK_IN (Digital clock)
      2. 2.3.2 Clocks
        1. 2.3.2.1  MCLK (Main Clock) Tree
        2. 2.3.2.2  CPUCLK (Processor Clock)
        3. 2.3.2.3  ULPCLK (Low-Power Clock)
        4. 2.3.2.4  MFCLK (Middle Frequency Clock)
        5. 2.3.2.5  MFPCLK (Middle Frequency Precision Clock)
        6. 2.3.2.6  LFCLK (Low-Frequency Clock)
        7. 2.3.2.7  HFCLK (High-Frequency External Clock)
        8. 2.3.2.8  HSCLK (High Speed Clock)
        9. 2.3.2.9  ADCCLK (ADC Sample Period Clock)
        10. 2.3.2.10 CANCLK (CAN-FD Functional Clock)
        11. 2.3.2.11 RTCCLK (RTC Clock)
        12. 2.3.2.12 External Clock Output (CLK_OUT)
        13. 2.3.2.13 Direct Clock Connections for Infrastructure
      3. 2.3.3 Clock Tree
        1. 2.3.3.1 Peripheral Clock Source Selection
      4. 2.3.4 Clock Monitors
        1. 2.3.4.1 LFCLK Monitor
        2. 2.3.4.2 MCLK Monitor
        3. 2.3.4.3 Startup Monitors
          1. 2.3.4.3.1 LFOSC Startup Monitor
          2. 2.3.4.3.2 LFXT Startup Monitor
          3. 2.3.4.3.3 HFCLK Startup Monitor
          4. 2.3.4.3.4 SYSPLL Startup Monitor
          5. 2.3.4.3.5 HSCLK Status
      5. 2.3.5 Frequency Clock Counter (FCC)
        1. 2.3.5.1 Using the FCC
        2. 2.3.5.2 FCC Frequency Computation and Accuracy
    4. 2.4 System Controller (SYSCTL)
      1. 2.4.1  Resets and Device Initialization
        1. 2.4.1.1 Reset Levels
          1. 2.4.1.1.1 Power-on Reset (POR) Reset Level
          2. 2.4.1.1.2 Brownout Reset (BOR) Reset Level
          3. 2.4.1.1.3 Boot Reset (BOOTRST) Reset Level
          4. 2.4.1.1.4 System Reset (SYSRST) Reset Level
          5. 2.4.1.1.5 CPU-only Reset (CPURST) Reset Level
        2. 2.4.1.2 Initial Conditions After POR
        3. 2.4.1.3 NRST Pin
        4. 2.4.1.4 SWD Pins
        5. 2.4.1.5 Generating Resets in Software
        6. 2.4.1.6 Reset Cause
        7. 2.4.1.7 Peripheral Reset Control
        8. 2.4.1.8 Boot Fail Handling
      2. 2.4.2  Operating Mode Selection
      3. 2.4.3  Asynchronous Fast Clock Requests
      4. 2.4.4  SRAM Write Protection
      5. 2.4.5  Flash Wait States
      6. 2.4.6  Flash Bank Address Swap
      7. 2.4.7  Shutdown Mode Handling
      8. 2.4.8  Configuration Lockout
      9. 2.4.9  System Status
      10. 2.4.10 Error Handling
      11. 2.4.11 SYSCTL Events
        1. 2.4.11.1 CPU Interrupt Event (CPU_INT)
        2. 2.4.11.2 Non-maskable Interrupt Event (NMI)
    5. 2.5 Quick Start Reference
      1. 2.5.1 Default Device Configuration
      2. 2.5.2 Leveraging MFCLK
      3. 2.5.3 Optimizing Power Consumption in STOP Mode
      4. 2.5.4 Optimizing Power Consumption in STANDBY Mode
      5. 2.5.5 Increasing MCLK and ULPCLK Precision
      6. 2.5.6 Configuring MCLK for Maximum Speed
      7. 2.5.7 High Speed Clock (SYSPLL, HFCLK) Handling in Low-Power Modes
      8. 2.5.8 Optimizing for Lowest Wakeup Latency
      9. 2.5.9 Optimizing for Lowest Peak Current in RUN/SLEEP Mode
    6. 2.6 SYSCTL Registers
  5. 3 CPU
    1. 3.1 Overview
    2. 3.2 Arm Cortex-M0+ CPU
      1. 3.2.1 CPU Register File
      2. 3.2.2 Stack Behavior
      3. 3.2.3 Execution Modes and Privilege Levels
      4. 3.2.4 Address Space and Supported Data Sizes
    3. 3.3 Interrupts and Exceptions
      1. 3.3.1 Peripheral Interrupts (IRQs)
        1. 3.3.1.1 Nested Vectored Interrupt Controller (NVIC)
        2. 3.3.1.2 Interrupt Groups
        3. 3.3.1.3 Wake Up Controller (WUC)
      2. 3.3.2 Interrupt and Exception Table
      3. 3.3.3 Processor Lockup Scenario
    4. 3.4 CPU Peripherals
      1. 3.4.1 System Control Block (SCB)
      2. 3.4.2 System Tick Timer (SysTick)
      3. 3.4.3 Memory Protection Unit (MPU)
    5. 3.5 Read-Only Memory (ROM)
    6. 3.6 CPUSS Registers
    7. 3.7 WUC Registers
  6. 4 DMA
    1. 4.1 DMA Overview
    2. 4.2 DMA Operation
      1. 4.2.1  Addressing Modes
      2. 4.2.2  Channel Types
      3. 4.2.3  Transfer Modes
        1. 4.2.3.1 Single Transfer
        2. 4.2.3.2 Block Transfer
        3. 4.2.3.3 Repeated Single Transfer
        4. 4.2.3.4 Repeated Block Transfer
        5. 4.2.3.5 Stride Mode
      4. 4.2.4  Extended Modes
        1. 4.2.4.1 Fill Mode
        2. 4.2.4.2 Table Mode
      5. 4.2.5  Initiating DMA Transfers
      6. 4.2.6  Stopping DMA Transfers
      7. 4.2.7  Channel Priorities
      8. 4.2.8  Burst Block Mode
      9. 4.2.9  Using DMA with System Interrupts
      10. 4.2.10 DMA Controller Interrupts
      11. 4.2.11 DMA Trigger Event Status
      12. 4.2.12 DMA Operating Mode Support
        1. 4.2.12.1 Transfer in RUN Mode
        2. 4.2.12.2 Transfer in SLEEP Mode
        3. 4.2.12.3 Transfer in STOP Mode
        4. 4.2.12.4 Transfers in STANDBY Mode
      13. 4.2.13 DMA Address and Data Errors
      14. 4.2.14 Interrupt and Event Support
    3. 4.3 DMA Registers
  7. 5 MATHACL
    1. 5.1 Overview
    2. 5.2 Data Format
      1. 5.2.1 Unsigned 32-bit integers
      2. 5.2.2 Signed 32-bit integers
      3. 5.2.3 Unsigned 32-bit numbers
      4. 5.2.4 Signed 32-bit numbers
    3. 5.3 Basic Operation
    4. 5.4 Configuration Details with Examples
      1. 5.4.1 Sine and Cosine (SINCOS)
      2. 5.4.2 Arc Tangent (ATAN2)
      3. 5.4.3 Square Root (SQRT)
      4. 5.4.4 Division (DIV)
      5. 5.4.5 Multiplication
        1. 5.4.5.1 Multiply32 (MPY32)
        2. 5.4.5.2 Square32 (SQUARE32)
        3. 5.4.5.3 Multiply64 (MPY64)
        4. 5.4.5.4 Square64 (SQUARE64)
      6. 5.4.6 Multiply-Accumulate (MAC)
      7. 5.4.7 Square Accumulate (SAC)
    5. 5.5 MATHACL Registers
  8. 6 NVM (Flash)
    1. 6.1 NVM Overview
      1. 6.1.1 Key Features
      2. 6.1.2 System Components
      3. 6.1.3 Terminology
    2. 6.2 Flash Memory Bank Organization
      1. 6.2.1 Banks
      2. 6.2.2 Flash Memory Regions
      3. 6.2.3 Addressing
        1. 6.2.3.1 Flash Memory Map
      4. 6.2.4 Memory Organization Examples
    3. 6.3 Flash Controller
      1. 6.3.1 Overview of Flash Controller Commands
      2. 6.3.2 NOOP Command
      3. 6.3.3 PROGRAM Command
        1. 6.3.3.1 Program Bit Masking Behavior
        2. 6.3.3.2 Programming Less Than One Flash Word
        3. 6.3.3.3 Target Data Alignment (Devices with Single Flash Word Programming Only)
        4. 6.3.3.4 Target Data Alignment (Devices With Multiword Programming)
        5. 6.3.3.5 Executing a PROGRAM Operation
      4. 6.3.4 ERASE Command
        1. 6.3.4.1 Erase Sector Masking Behavior
        2. 6.3.4.2 Executing an ERASE Operation
      5. 6.3.5 READVERIFY Command
        1. 6.3.5.1 Executing a READVERIFY Operation
      6. 6.3.6 BLANKVERIFY Command
        1. 6.3.6.1 Executing a BLANKVERIFY Operation
      7. 6.3.7 Command Diagnostics
        1. 6.3.7.1 Command Status
        2. 6.3.7.2 Address Translation
        3. 6.3.7.3 Pulse Counts
      8. 6.3.8 Overriding the System Address With a Bank ID, Region ID, and Bank Address
      9. 6.3.9 FLASHCTL Events
        1. 6.3.9.1 CPU Interrupt Event Publisher
    4. 6.4 Write Protection
      1. 6.4.1 Write Protection Resolution
      2. 6.4.2 Static Write Protection
      3. 6.4.3 Dynamic Write Protection
        1. 6.4.3.1 Configuring Protection for the MAIN Region
        2. 6.4.3.2 Configuring Protection for the NONMAIN Region
    5. 6.5 Read Interface
      1. 6.5.1 Bank Address Swapping
      2. 6.5.2 ECC Error Handling
        1. 6.5.2.1 Single bit (correctable) errors
        2. 6.5.2.2 Dual bit (uncorrectable) errors
    6. 6.6 FLASHCTL Registers
  9. 7 Events
    1. 7.1 Events Overview
      1. 7.1.1 Event Publisher
      2. 7.1.2 Event Subscriber
      3. 7.1.3 Event Fabric Routing
        1. 7.1.3.1 CPU Interrupt Event Route (CPU_INT)
        2. 7.1.3.2 DMA Trigger Event Route (DMA_TRIGx)
        3. 7.1.3.3 Generic Event Route (GEN_EVENTx)
      4. 7.1.4 Event Routing Map
      5. 7.1.5 Event Propagation Latency
    2. 7.2 Events Operation
      1. 7.2.1 CPU Interrupt
      2. 7.2.2 DMA Trigger
      3. 7.2.3 Peripheral to Peripheral Event
      4. 7.2.4 Extended Module Description Register
      5. 7.2.5 Using Event Registers
        1. 7.2.5.1 Event Registers
        2. 7.2.5.2 Configuring Events
        3. 7.2.5.3 Responding to CPU Interrupts in Application Software
        4. 7.2.5.4 Hardware Event Handling
  10. 8 IOMUX
    1. 8.1 IOMUX Overview
      1. 8.1.1 IO Types and Analog Sharing
    2. 8.2 IOMUX Operation
      1. 8.2.1 Peripheral Function (PF) Assignment
      2. 8.2.2 Logic High to Hi-Z Conversion
      3. 8.2.3 Logic Inversion
      4. 8.2.4 SHUTDOWN Mode Wakeup Logic
      5. 8.2.5 Pullup/Pulldown Resistors
      6. 8.2.6 Drive Strength Control
      7. 8.2.7 Hysteresis and Logic Level Control
    3. 8.3 IOMUX (PINCMx) Register Format
    4. 8.4 IOMUX Registers
  11. 9 GPIO
    1. 9.1 GPIO Overview
    2. 9.2 GPIO Operation
      1. 9.2.1 GPIO Ports
      2. 9.2.2 GPIO Read/Write Interface
      3. 9.2.3 GPIO Input Glitch Filtering and Synchronization
      4. 9.2.4 GPIO Fast Wake
      5. 9.2.5 GPIO DMA Interface
      6. 9.2.6 Event Publishers and Subscribers
    3. 9.3 GPIO Registers
  12. 10ADC
    1. 10.1 ADC Overview
    2. 10.2 ADC Operation
      1. 10.2.1  ADC Core
      2. 10.2.2  Voltage Reference Options
      3. 10.2.3  Generic Resolution Modes
      4. 10.2.4  Hardware Averaging
      5. 10.2.5  ADC Clocking
      6. 10.2.6  Common ADC Use Cases
      7. 10.2.7  Power Down Behavior
      8. 10.2.8  Sampling Trigger Sources and Sampling Modes
        1. 10.2.8.1 AUTO Sampling Mode
        2. 10.2.8.2 MANUAL Sampling Mode
      9. 10.2.9  Sampling Period
      10. 10.2.10 Conversion Modes
      11. 10.2.11 Data Format
      12. 10.2.12 Advanced Features
        1. 10.2.12.1 Simultaneous Sampling
        2. 10.2.12.2 Window Comparator
        3. 10.2.12.3 DMA and FIFO Operation
        4. 10.2.12.4 Analog Peripheral Interconnection
      13. 10.2.13 Status Register
      14. 10.2.14 ADC Events
        1. 10.2.14.1 CPU Interrupt Event Publisher (CPU_INT)
        2. 10.2.14.2 Generic Event Publisher (GEN_EVENT)
        3. 10.2.14.3 DMA Trigger Event Publisher (DMA_TRIG)
        4. 10.2.14.4 Generic Event Subscriber (FSUB_0)
    3. 10.3 ADC12 Registers
  13. 11COMP
    1. 11.1 Comparator Overview
    2. 11.2 Comparator Operation
      1. 11.2.1  Comparator Configuration
      2. 11.2.2  Comparator Channels Selection
      3. 11.2.3  Comparator Output
      4. 11.2.4  Output Filter
      5. 11.2.5  Sampled Output Mode
      6. 11.2.6  Blanking Mode
      7. 11.2.7  Reference Voltage Generator
      8. 11.2.8  Window Comparator Mode
      9. 11.2.9  Comparator Hysteresis
      10. 11.2.10 Input SHORT Switch
      11. 11.2.11 Interrupt and Events Support
        1. 11.2.11.1 CPU Interrupt Event Publisher (CPU_INT)
        2. 11.2.11.2 Generic Event Publisher (GEN_EVENT)
        3. 11.2.11.3 Generic Event Subscribers
    3. 11.3 COMP Registers
  14. 12OPA
    1. 12.1 OPA Overview
    2. 12.2 OPA Operation
      1. 12.2.1 Analog Core
      2. 12.2.2 Power Up Behavior
      3. 12.2.3 Inputs
      4. 12.2.4 Output
      5. 12.2.5 Clock Requirements
      6. 12.2.6 Chopping
      7. 12.2.7 OPA Amplifier Modes
        1. 12.2.7.1 General-Purpose Mode
        2. 12.2.7.2 Buffer Mode
        3. 12.2.7.3 OPA PGA Mode
          1. 12.2.7.3.1 Inverting PGA Mode
          2. 12.2.7.3.2 Non-inverting PGA Mode
        4. 12.2.7.4 Difference Amplifier Mode
        5. 12.2.7.5 Cascade Amplifier Mode
      8. 12.2.8 OPA Configuration Selection
      9. 12.2.9 Burnout Current Source
    3. 12.3 OA Registers
  15. 13GPAMP
    1. 13.1 GPAMP Overview
    2. 13.2 GPAMP Operation
      1. 13.2.1 Analog Core
      2. 13.2.2 Power Up Behavior
      3. 13.2.3 Inputs
      4. 13.2.4 Output
      5. 13.2.5 GPAMP Amplifier Modes
        1. 13.2.5.1 General-Purpose Mode
        2. 13.2.5.2 ADC Buffer Mode
        3. 13.2.5.3 Unity Gain Mode
      6. 13.2.6 Chopping
    3. 13.3 GPAMP Registers
  16. 14DAC
    1. 14.1 DAC Introduction
    2. 14.2 DAC Operation
      1. 14.2.1  DAC Core
      2. 14.2.2  DAC Output
      3. 14.2.3  DAC Voltage Reference
      4. 14.2.4  DAC Output Buffers
      5. 14.2.5  DAC Data Formats
      6. 14.2.6  Sample Time Generator
      7. 14.2.7  DAC FIFO Structure
        1. 14.2.7.1 Loading Data From FIFO to Internal DAC Data Register
      8. 14.2.8  DAC Operation With DMA Controller
        1. 14.2.8.1 DMA Trigger Interface
        2. 14.2.8.2 DMA Status Interface
        3. 14.2.8.3 DMA Trigger Generation Scheme
      9. 14.2.9  DAC Operation With CPU
        1. 14.2.9.1 Interrupt conditions for DAC operation with CPU
      10. 14.2.10 Data Register Format
      11. 14.2.11 DAC Output Amplifier Offset Calibration
      12. 14.2.12 Interrupt and Event Support
        1. 14.2.12.1 CPU Interrupt Event Publisher (CPU_INT)
        2. 14.2.12.2 Generic Event Publisher (GEN_EVENT)
        3. 14.2.12.3 DMA Trigger Event Publisher
        4. 14.2.12.4 Generic Event Subscriber (FSUB_0)
    3. 14.3 DAC12 Registers
  17. 15VREF
    1. 15.1 VREF Overview
    2. 15.2 VREF Operation
      1. 15.2.1 Internal Reference Generation
      2. 15.2.2 External Reference Input
      3. 15.2.3 Analog Peripheral Interface
    3. 15.3 VREF Registers
  18. 16UART
    1. 16.1 UART Overview
      1. 16.1.1 Purpose of the Peripheral
      2. 16.1.2 Features
      3. 16.1.3 Functional Block Diagram
    2. 16.2 UART Operation
      1. 16.2.1 Clock Control
      2. 16.2.2 Signal Descriptions
      3. 16.2.3 General Architecture and Protocol
        1. 16.2.3.1  Transmit Receive Logic
        2. 16.2.3.2  Bit Sampling
        3. 16.2.3.3  Majority Voting Feature
        4. 16.2.3.4  Baud Rate Generation
        5. 16.2.3.5  Data Transmission
        6. 16.2.3.6  Error and Status
        7. 16.2.3.7  Local Interconnect Network (LIN) Support
          1. 16.2.3.7.1 LIN Responder Transmission Delay
        8. 16.2.3.8  Flow Control
        9. 16.2.3.9  Idle-Line Multiprocessor
        10. 16.2.3.10 9-Bit UART Mode
        11. 16.2.3.11 RS485 Support
        12. 16.2.3.12 DALI Protocol
        13. 16.2.3.13 Manchester Encoding and Decoding
        14. 16.2.3.14 IrDA Encoding and Decoding
        15. 16.2.3.15 ISO7816 Smart Card Support
        16. 16.2.3.16 Address Detection
        17. 16.2.3.17 FIFO Operation
        18. 16.2.3.18 Loopback Operation
        19. 16.2.3.19 Glitch Suppression
      4. 16.2.4 Low Power Operation
      5. 16.2.5 Reset Considerations
      6. 16.2.6 Initialization
      7. 16.2.7 Interrupt and Events Support
        1. 16.2.7.1 CPU Interrupt Event Publisher (CPU_INT)
        2. 16.2.7.2 DMA Trigger Publisher (DMA_TRIG_RX, DMA_TRIG_TX)
      8. 16.2.8 Emulation Modes
    3. 16.3 UART Registers
  19. 17SPI
    1. 17.1 SPI Overview
      1. 17.1.1 Purpose of the Peripheral
      2. 17.1.2 Features
      3. 17.1.3 Functional Block Diagram
      4. 17.1.4 External Connections and Signal Descriptions
    2. 17.2 SPI Operation
      1. 17.2.1 Clock Control
      2. 17.2.2 General Architecture
        1. 17.2.2.1 Chip Select and Command Handling
          1. 17.2.2.1.1 Chip Select Control
          2. 17.2.2.1.2 Command Data Control
        2. 17.2.2.2 Data Format
        3. 17.2.2.3 Delayed data sampling
        4. 17.2.2.4 Clock Generation
        5. 17.2.2.5 FIFO Operation
        6. 17.2.2.6 Loopback mode
        7. 17.2.2.7 DMA Operation
        8. 17.2.2.8 Repeat Transfer mode
        9. 17.2.2.9 Low Power Mode
      3. 17.2.3 Protocol Descriptions
        1. 17.2.3.1 Motorola SPI Frame Format
        2. 17.2.3.2 Texas Instruments Synchronous Serial Frame Format
      4. 17.2.4 Reset Considerations
      5. 17.2.5 Initialization
      6. 17.2.6 Interrupt and Events Support
        1. 17.2.6.1 CPU Interrupt Event Publisher (CPU_INT)
        2. 17.2.6.2 DMA Trigger Publisher (DMA_TRIG_RX, DMA_TRIG_TX)
      7. 17.2.7 Emulation Modes
    3. 17.3 SPI Registers
  20. 18I2C
    1. 18.1 I2C Overview
      1. 18.1.1 Purpose of the Peripheral
      2. 18.1.2 Features
      3. 18.1.3 Functional Block Diagram
      4. 18.1.4 Environment and External Connections
    2. 18.2 I2C Operation
      1. 18.2.1 Clock Control
        1. 18.2.1.1 Clock Select and I2C Speed
        2. 18.2.1.2 Clock Startup
      2. 18.2.2 Signal Descriptions
      3. 18.2.3 General Architecture
        1. 18.2.3.1  I2C Bus Functional Overview
        2. 18.2.3.2  START and STOP Conditions
        3. 18.2.3.3  Data Format with 7-Bit Address
        4. 18.2.3.4  Acknowledge
        5. 18.2.3.5  Repeated Start
        6. 18.2.3.6  SCL Clock Low Timeout
        7. 18.2.3.7  Clock Stretching
        8. 18.2.3.8  Dual Address
        9. 18.2.3.9  Arbitration
        10. 18.2.3.10 Multiple Controller Mode
        11. 18.2.3.11 Glitch Suppression
        12. 18.2.3.12 FIFO operation
          1. 18.2.3.12.1 Flushing Stale Tx Data in Target Mode
        13. 18.2.3.13 Loopback mode
        14. 18.2.3.14 Burst Mode
        15. 18.2.3.15 DMA Operation
        16. 18.2.3.16 Low-Power Operation
      4. 18.2.4 Protocol Descriptions
        1. 18.2.4.1 I2C Controller Mode
          1. 18.2.4.1.1 Controller Configuration
          2. 18.2.4.1.2 Controller Mode Operation
          3. 18.2.4.1.3 Read On TX Empty
        2. 18.2.4.2 I2C Target Mode
          1. 18.2.4.2.1 Target Mode Operation
      5. 18.2.5 Reset Considerations
      6. 18.2.6 Initialization
      7. 18.2.7 Interrupt and Events Support
        1. 18.2.7.1 CPU Interrupt Event Publisher (CPU_INT)
        2. 18.2.7.2 DMA Trigger Publisher (DMA_TRIG1, DMA_TRIG0)
      8. 18.2.8 Emulation Modes
  21. 19I2C Registers
  22. 20CAN-FD
    1. 20.1 MCAN Overview
      1. 20.1.1 MCAN Features
    2. 20.2 MCAN Environment
    3. 20.3 CAN Network Basics
    4. 20.4 MCAN Functional Description
      1. 20.4.1  Clock Set up
      2. 20.4.2  Module Clocking Requirements
      3. 20.4.3  Interrupt Requests
      4. 20.4.4  Operating Modes
        1. 20.4.4.1 Normal Operation
        2. 20.4.4.2 CAN Classic
        3. 20.4.4.3 CAN FD Operation
      5. 20.4.5  Software Initialization
      6. 20.4.6  Transmitter Delay Compensation
        1. 20.4.6.1 Description
        2. 20.4.6.2 Transmitter Delay Compensation Measurement
      7. 20.4.7  Restricted Operation Mode
      8. 20.4.8  Bus Monitoring Mode
      9. 20.4.9  Disabled Automatic Retransmission (DAR) Mode
        1. 20.4.9.1 Frame Transmission in DAR Mode
      10. 20.4.10 Clock Stop Mode
        1. 20.4.10.1 Suspend Mode
        2. 20.4.10.2 Wakeup Request
      11. 20.4.11 Test Modes
        1. 20.4.11.1 External Loop Back Mode
        2. 20.4.11.2 Internal Loop Back Mode
      12. 20.4.12 Timestamp Generation
        1. 20.4.12.1 External Timestamp Counter
      13. 20.4.13 Timeout Counter
      14. 20.4.14 Safety
        1. 20.4.14.1 ECC Wrapper
        2. 20.4.14.2 ECC Aggregator
          1. 20.4.14.2.1 ECC Aggregator Overview
          2. 20.4.14.2.2 ECC Aggregator Registers
        3. 20.4.14.3 Reads to ECC Control and Status Registers
        4. 20.4.14.4 ECC Interrupts
      15. 20.4.15 Tx Handling
        1. 20.4.15.1 Transmit Pause
        2. 20.4.15.2 Dedicated Tx Buffers
        3. 20.4.15.3 Tx FIFO
        4. 20.4.15.4 Tx Queue
        5. 20.4.15.5 Mixed Dedicated Tx Buffers/Tx FIFO
        6. 20.4.15.6 Mixed Dedicated Tx Buffers/Tx Queue
        7. 20.4.15.7 Transmit Cancellation
        8. 20.4.15.8 Tx Event Handling
        9. 20.4.15.9 FIFO Acknowledge Handling
      16. 20.4.16 Rx Handling
        1. 20.4.16.1 Acceptance Filtering
          1. 20.4.16.1.1 Range Filter
          2. 20.4.16.1.2 Filter for Specific IDs
          3. 20.4.16.1.3 Classic Bit Mask Filter
          4. 20.4.16.1.4 Standard Message ID Filtering
          5. 20.4.16.1.5 Extended Message ID Filtering
      17. 20.4.17 Rx FIFOs
        1. 20.4.17.1 Rx FIFO Blocking Mode
        2. 20.4.17.2 Rx FIFO Overwrite Mode
      18. 20.4.18 Dedicated Rx Buffers
        1. 20.4.18.1 Rx Buffer Handling
      19. 20.4.19 Message RAM
        1. 20.4.19.1 Message RAM Configuration
        2. 20.4.19.2 Rx Buffer and FIFO Element
        3. 20.4.19.3 Tx Buffer Element
        4. 20.4.19.4 Tx Event FIFO Element
        5. 20.4.19.5 Standard Message ID Filter Element
        6. 20.4.19.6 Extended Message ID Filter Element
    5. 20.5 MCAN Integration
    6. 20.6 Interrupt and Event Support
      1. 20.6.1 CPU Interrupt Event Publisher (CPU_INT)
    7. 20.7 MCAN Registers
  23. 21MCAN Registers
  24. 22CRC
    1. 22.1 CRC Overview
      1. 22.1.1 CRC16-CCITT
      2. 22.1.2 CRC32-ISO3309
    2. 22.2 CRC Operation
      1. 22.2.1 CRC Generator Implementation
      2. 22.2.2 Configuration
        1. 22.2.2.1 Polynomial Selection
        2. 22.2.2.2 Bit Order
        3. 22.2.2.3 Byte Swap
        4. 22.2.2.4 Byte Order
        5. 22.2.2.5 CRC C Library Compatibility
    3. 22.3 CRC Registers
  25. 23AES
    1. 23.1 AES Overview
      1. 23.1.1 AES Performance
    2. 23.2 AES Operation
      1. 23.2.1 AES Register Access Rules
      2. 23.2.2 Loading the Key
      3. 23.2.3 Loading Data
      4. 23.2.4 Reading Data
      5. 23.2.5 Triggering an Encryption or Decryption
      6. 23.2.6 Single Block Operations
        1. 23.2.6.1 Encryption
        2. 23.2.6.2 Decryption
          1. 23.2.6.2.1 Pregenerating a Decryption Key
      7. 23.2.7 Block Cipher Mode Operations
        1. 23.2.7.1 Electronic Codebook (ECB) Mode
          1. 23.2.7.1.1 ECB Encryption
          2. 23.2.7.1.2 ECB Decryption
        2. 23.2.7.2 Cipher Block Chaining (CBC) Mode
          1. 23.2.7.2.1 CBC Encryption
          2. 23.2.7.2.2 CBC Decryption
        3. 23.2.7.3 Output Feedback (OFB) Mode
          1. 23.2.7.3.1 OFB Encryption
          2. 23.2.7.3.2 OFB Decryption
        4. 23.2.7.4 Cipher Feedback (CFB) Mode
          1. 23.2.7.4.1 CFB Encryption
          2. 23.2.7.4.2 CFB Decryption
        5. 23.2.7.5 Counter (CTR) Mode
          1. 23.2.7.5.1 CTR Encryption
          2. 23.2.7.5.2 CTR Decryption
      8. 23.2.8 AES Events
        1. 23.2.8.1 CPU Interrupt Event Publisher (CPU_EVENT)
        2. 23.2.8.2 DMA Trigger Event Publisher (DMA_TRIG0)
        3. 23.2.8.3 DMA Trigger Event Publisher (DMA_TRIG1)
        4. 23.2.8.4 DMA Trigger Event Publisher (DMA_TRIG2)
    3. 23.3 AES Registers
  26. 24TRNG
    1. 24.1 TRNG Overview
    2. 24.2 TRNG Operation
      1. 24.2.1 TRNG Generation Data Path
      2. 24.2.2 Clock Configuration and Output Rate
      3. 24.2.3 Behavior in Low Power Modes
      4. 24.2.4 Health Tests
        1. 24.2.4.1 Digital Block Startup Self-Test
        2. 24.2.4.2 Analog Block Startup Self-Test
        3. 24.2.4.3 Runtime Health Test
          1. 24.2.4.3.1 Repetition Count Test
          2. 24.2.4.3.2 Adaptive Proportion Test
          3. 24.2.4.3.3 Handling Runtime Health Test Failures
      5. 24.2.5 Configuration
        1. 24.2.5.1 TRNG State Machine
          1. 24.2.5.1.1 Changing TRNG States
        2. 24.2.5.2 Using the TRNG
        3. 24.2.5.3 TRNG Events
          1. 24.2.5.3.1 CPU Interrupt Event Publisher (CPU_INT)
    3. 24.3 TRNG Registers
  27. 25Timers (TIMx)
    1. 25.1 TIMx Overview
      1. 25.1.1 TIMG Overview
        1. 25.1.1.1 TIMG Features
        2. 25.1.1.2 Functional Block Diagram
      2. 25.1.2 TIMA Overview
        1. 25.1.2.1 TIMA Features
        2. 25.1.2.2 Functional Block Diagram
      3. 25.1.3 TIMx Instance Configuration
    2. 25.2 TIMx Operation
      1. 25.2.1  Timer Counter
        1. 25.2.1.1 Clock Source Select and Prescaler
          1. 25.2.1.1.1 Internal Clock and Prescaler
          2. 25.2.1.1.2 External Signal Trigger
        2. 25.2.1.2 Repeat Counter (TIMA only)
      2. 25.2.2  Counting Mode Control
        1. 25.2.2.1 One-shot and Periodic Modes
        2. 25.2.2.2 Down Counting Mode
        3. 25.2.2.3 Up/Down Counting Mode
        4. 25.2.2.4 Up Counting Mode
        5. 25.2.2.5 Phase Load (TIMA only)
      3. 25.2.3  Capture/Compare Module
        1. 25.2.3.1 Capture Mode
          1. 25.2.3.1.1 Input Selection, Counter Conditions, and Inversion
            1. 25.2.3.1.1.1 CCP Input Edge Synchronization
            2. 25.2.3.1.1.2 CCP Input Pulse Conditions
            3. 25.2.3.1.1.3 Counter Control Operation
            4. 25.2.3.1.1.4 CCP Input Filtering
            5. 25.2.3.1.1.5 Input Selection
          2. 25.2.3.1.2 Use Cases
            1. 25.2.3.1.2.1 Edge Time Capture
            2. 25.2.3.1.2.2 Period Capture
            3. 25.2.3.1.2.3 Pulse Width Capture
            4. 25.2.3.1.2.4 Combined Pulse Width and Period Time
          3. 25.2.3.1.3 QEI Mode (TIMG with QEI support only)
            1. 25.2.3.1.3.1 QEI With 2-Signal
            2. 25.2.3.1.3.2 QEI With Index Input
            3. 25.2.3.1.3.3 QEI Error Detection
          4. 25.2.3.1.4 Hall Input Mode (TIMG with QEI support only)
        2. 25.2.3.2 Compare Mode
          1. 25.2.3.2.1 Edge Count
      4. 25.2.4  Shadow Load and Shadow Compare
        1. 25.2.4.1 Shadow Load
        2. 25.2.4.2 Shadow Compare
      5. 25.2.5  Output Generator
        1. 25.2.5.1 Configuration
        2. 25.2.5.2 Use Cases
          1. 25.2.5.2.1 Edge-Aligned PWM
          2. 25.2.5.2.2 Center-Aligned PWM
          3. 25.2.5.2.3 Asymmetric PWM (TIMA only)
          4. 25.2.5.2.4 Complementary PWM with Deadband Insertion (TIMA only)
        3. 25.2.5.3 Forced Output
      6. 25.2.6  Fault Handler (TIMA only)
        1. 25.2.6.1 Fault Input Conditioning
        2. 25.2.6.2 Fault Input Sources
        3. 25.2.6.3 Counter Behavior With Fault Conditions
        4. 25.2.6.4 Output Behavior With Fault Conditions
      7. 25.2.7  Synchronization With Cross Trigger
        1. 25.2.7.1 Main Timer Cross Trigger Configuration
        2. 25.2.7.2 Secondary Timer Cross Trigger Configuration
      8. 25.2.8  Low Power Operation
      9. 25.2.9  Interrupt and Event Support
        1. 25.2.9.1 CPU Interrupt Event Publisher (CPU_INT)
        2. 25.2.9.2 Generic Event Publisher and Subscriber (GEN_EVENT0 and GEN_EVENT1)
        3. 25.2.9.3 Generic Subscriber Event Example (COMP to TIMx)
      10. 25.2.10 Debug Handler (TIMA only)
    3. 25.3 Timers (TIMx) Registers
  28. 26RTC
    1. 26.1 Overview
    2. 26.2 Basic Operation
    3. 26.3 Configuration
      1. 26.3.1 Clocking
      2. 26.3.2 Reading and Writing to RTC Peripheral Registers
      3. 26.3.3 Binary vs. BCD
      4. 26.3.4 Leap Year Handling
      5. 26.3.5 Calendar Alarm Configuration
      6. 26.3.6 Interval Alarm Configuration
      7. 26.3.7 Periodic Alarm Configuration
      8. 26.3.8 Calibration
        1. 26.3.8.1 Crystal Offset Error
          1. 26.3.8.1.1 Offset Error Correction Mechanism
        2. 26.3.8.2 Crystal Temperature Error
          1. 26.3.8.2.1 Temperature Drift Correction Mechanism
      9. 26.3.9 RTC Events
        1. 26.3.9.1 CPU Interrupt Event Publisher (CPU_INT)
        2. 26.3.9.2 Generic Event Publisher (GEN_EVENT)
    4. 26.4 RTC Registers
  29. 27WWDT
    1. 27.1 WWDT Overview
      1. 27.1.1 Watchdog Mode
      2. 27.1.2 Interval Timer Mode
    2. 27.2 WWDT Operation
      1. 27.2.1 Mode Selection
      2. 27.2.2 Clock Configuration
      3. 27.2.3 Low-Power Mode Behavior
      4. 27.2.4 Debug Behavior
      5. 27.2.5 WWDT Events
        1. 27.2.5.1 CPU Interrupt Event Publisher (CPU_INT)
    3. 27.3 WWDT Registers
  30. 28Debug
    1. 28.1 Overview
      1. 28.1.1 Debug Interconnect
      2. 28.1.2 Physical Interface
      3. 28.1.3 Debug Access Ports
    2. 28.2 Debug Features
      1. 28.2.1 Processor Debug
        1. 28.2.1.1 Breakpoint Unit (BPU)
        2. 28.2.1.2 Data Watchpoint and Trace Unit (DWT)
        3. 28.2.1.3 Processor Trace (MTB)
      2. 28.2.2 Peripheral Debug
      3. 28.2.3 EnergyTrace Technology
    3. 28.3 Behavior in Low Power Modes
    4. 28.4 Restricting Debug Access
    5. 28.5 Mailbox (DSSM)
      1. 28.5.1 DSSM Events
        1. 28.5.1.1 CPU Interrupt Event (CPU_INT)
      2. 28.5.2 DEBUGSS Registers
  31. 29Revision History

3.3.1.1 Nested Vectored Interrupt Controller (NVIC)

The nested vectored interrupt controller (NVIC) is an industry-standard Arm component which interfaces peripheral interrupts (which are external to the processor) into the CPU. The NVIC supports connection of up to 32 native peripheral interrupt sources.

The NVIC is configured through memory-mapped registers in the system private peripheral bus (PPB) region. See Table 3-8 for the list of NVIC registers. The software development kit (SDK) provided with the devices supports the standard Arm Cortex Microcontroller Software Interface Standard (CMSIS) register access definitions for the NVIC. Application software must use 32-bit aligned, word-size transactions when accessing any NVIC register.

In addition to interfacing peripheral interrupts to the processor, the NVIC also supports programmable priority for each interrupt.

Enabling and Disabling Interrupts

Peripheral interrupt enables can be read, set, and cleared through the interrupt set-enable (ISER) and interrupt clear-enable (ICER) registers in the NVIC. The 32 interrupts are mapped to the ISER and ICER registers with interrupt zero in the BIT0 position (LSB) and interrupt 31 in the BIT31 position (MSB) of each register. To enable an interrupt, set the corresponding enable bit in the ISER register. Writing a '0' to ISER has no effect. It is possible to read the ISER register to determine which interrupts are enabled. Upon a read, a '1' indicates that an interrupt is enabled; a '0' indicates disabled. To disable an interrupt, set the corresponding enable bit in the ICER register. Writing a '0' to ICER has no effect.

Note: In addition to enabling a peripheral interrupt at the NVIC, it is generally necessary to also configure the interrupt configuration of the corresponding peripheral as well. Most peripherals have multiple interrupt sources, which are merged together in the peripheral to source a single NVIC interrupt. Masking of individual peripheral interrupts is done within the peripheral's interrupt management registers.

In the event that an interrupt is disabled in the NVIC, if the interrupt is asserted by the corresponding peripheral then the NVIC interrupt will go to a pending state but the processor is not interrupted. If an interrupt is disabled when in an active state (when a handler is running) it will remain active until the exception handler returns or a reset occurs, but no further activations will happen.

Note: If a peripheral asserts an interrupt to the NVIC, but that peripheral's interrupt in the NVIC is disabled, the device may remain in a higher power mode than expected as the wake-up controller (WUC) is holding an event for the processor. To prevent this situation, ensure peripheral interrupts are masked at the peripheral directly, versus only masking interrupts at the NVIC.

Setting and Clearing Pending Interrupt Status

Pending interrupt status can be read, set, and cleared through the interrupt set-pending (ISPR) and interrupt clear-pending (ICPR) registers in the NVIC. The 32 interrupts are mapped to the ISPR and ICPR registers with interrupt zero in the BIT0 position (LSB) and interrupt 31 in the BIT31 position (MSB) of each register. To read if an interrupt is pending, read either the ISPR or the ICPR. Upon a read, a '1' indicates that an interrupt is pending; a '0' indicates not pending. To set an interrupt to a pending state through software, set the corresponding bit in the ISPR register. Writing a '0' to ISPR has no effect. To clear an interrupt pending state, set the corresponding bit in the ICPR register. Writing a '0' to ICPR has no effect. Note that if a peripheral interrupt condition is still present, the pending state will be set again by hardware even if it is cleared.

Setting Interrupt Priority

Interrupts on the NVIC have programmable priority. There are four priority levels possible. Priority is set by programming the eight IPRx registers in the NVIC. Each priority field is 8 bits in length, and the priority for 4 interrupts is configured per 32-bit register. The Arm Cortex-M0+ only implements the most significant 2 bits of each 8-bit priority field (giving the 4 priority levels). Lower priority values have higher priority. System exceptions (reset, NMI, hard fault) have fixed priorities of -3, -2, and -1, respectively. As such, these exceptions always have higher priority than peripheral interrupts. Peripheral interrupt priorities are programmable as 0, 64, 128, or 192, with 0 being highest priority and 192 being lowest priority.

If the processor is currently handling an exception, it can only be preempted by a higher priority exception. In the event that there are multiple exceptions in a pending state which all have the same priority level assigned, the exception with the lowest exception number is taken first.

Note: Application software must not change the priority of an interrupt while the corresponding interrupt is either active (being handled) or enabled. Doing so can result in unpredictable behavior.
Table 3-2 Arm Cortex-M0+ NVIC Registers
Address Register CMSIS Description
0xE000.E100 NVIC_ISER NVIC->ISER[0] Interrupt set-enable register
0xE000.E180 NVIC_ICER NVIC->ICER[0] Interrupt clear-enable register
0xE000.E200 NVIC_ISPR NVIC->ISPR[0] Interrupt set-pending register
0xE000.E280 NVIC_ICPR NVIC->ICPR[0] Interrupt clear-pending register
0xE000.E400 NVIC_IPR0 NVIC->IP[0] Interrupt priority register (0-3)
0xE000.E404 NVIC_IPR1 NVIC->IP[1] Interrupt priority register (4-7)
0xE000.E408 NVIC_IPR2 NVIC->IP[2] Interrupt priority register (8-11)
0xE000.E40C NVIC_IPR3 NVIC->IP[3] Interrupt priority register (12-15)
0xE000.E410 NVIC_IPR4 NVIC->IP[4] Interrupt priority register (16-19)
0xE000.E414 NVIC_IPR5 NVIC->IP[5] Interrupt priority register (20-23)
0xE000.E418 NVIC_IPR6 NVIC->IP[6] Interrupt priority register (24-27)
0xE000.E41C NVIC_IPR7 NVIC->IP[7] Interrupt priority register (28-31)
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