SPRSPB1A October   2025  – January 2026 F28377D-SEP

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
    1. 3.1 Functional Block Diagram
  5. 4 Device Comparison
    1. 4.1 Related Products
  6. 5 Pin Configuration and Functions
    1. 5.1 Pin Diagrams
    2. 5.2 Signal Descriptions
      1. 5.2.1 Signal Descriptions
    3. 5.3 Pins With Internal Pullup and Pulldown
    4. 5.4 Pin Multiplexing
      1. 5.4.1 GPIO Muxed Pins
      2. 5.4.2 Input X-BAR
      3. 5.4.3 Output X-BAR and ePWM X-BAR
      4. 5.4.4 USB Pin Muxing
      5. 5.4.5 High-Speed SPI Pin Muxing
    5. 5.5 Connections for Unused Pins
  7. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Power Consumption Summary
      1. 6.4.1 Device Current Consumption at 200-MHz SYSCLK
      2. 6.4.2 Current Consumption Graphs
      3. 6.4.3 Reducing Current Consumption
    5. 6.5  Electrical Characteristics
    6. 6.6  Thermal Resistance Characteristics
      1. 6.6.1 PTP Package
    7. 6.7  Thermal Design Considerations
    8. 6.8  System
      1. 6.8.1  Power Sequencing
        1. 6.8.1.1 Signal Pin Requirements
        2. 6.8.1.2 VDDIO, VDDA, VDD3VFL, and VDDOSC Requirements
        3. 6.8.1.3 VDD Requirements
        4. 6.8.1.4 Supply Ramp Rate
          1. 6.8.1.4.1 Supply Ramp Rate
        5. 6.8.1.5 Supply Supervision
      2. 6.8.2  Reset Timing
        1. 6.8.2.1 Reset Sources
        2. 6.8.2.2 Reset Electrical Data and Timing
          1. 6.8.2.2.1 Reset ( XRS) Timing Requirements
          2. 6.8.2.2.2 Reset ( XRS) Switching Characteristics
      3. 6.8.3  Clock Specifications
        1. 6.8.3.1 Clock Sources
        2. 6.8.3.2 Clock Frequencies, Requirements, and Characteristics
          1. 6.8.3.2.1 Input Clock Frequency and Timing Requirements, PLL Lock Times
            1. 6.8.3.2.1.1 Input Clock Frequency
            2. 6.8.3.2.1.2 X1 Input Level Characteristics When Using an External Clock Source (Not a Crystal)
            3. 6.8.3.2.1.3 XTAL Oscillator Characteristics
            4. 6.8.3.2.1.4 X1 Timing Requirements
            5. 6.8.3.2.1.5 AUXCLKIN Timing Requirements
            6. 6.8.3.2.1.6 PLL Lock Times
          2. 6.8.3.2.2 Internal Clock Frequencies
            1. 6.8.3.2.2.1 Internal Clock Frequencies
          3. 6.8.3.2.3 Output Clock Frequency and Switching Characteristics
            1. 6.8.3.2.3.1 Output Clock Frequency
            2. 6.8.3.2.3.2 XCLKOUT Switching Characteristics (PLL Bypassed or Enabled)
        3. 6.8.3.3 Input Clocks and PLLs
        4. 6.8.3.4 XTAL Oscillator
          1. 6.8.3.4.1 Introduction
          2. 6.8.3.4.2 Overview
            1. 6.8.3.4.2.1 Electrical Oscillator
              1. 6.8.3.4.2.1.1 Modes of Operation
                1. 6.8.3.4.2.1.1.1 Crystal Mode of Operation
                2. 6.8.3.4.2.1.1.2 Single-Ended Mode of Operation
              2. 6.8.3.4.2.1.2 XTAL Output on XCLKOUT
            2. 6.8.3.4.2.2 Quartz Crystal
          3. 6.8.3.4.3 Functional Operation
            1. 6.8.3.4.3.1 ESR – Effective Series Resistance
            2. 6.8.3.4.3.2 Rneg – Negative Resistance
            3. 6.8.3.4.3.3 Start-up Time
            4. 6.8.3.4.3.4 DL – Drive Level
          4. 6.8.3.4.4 How to Choose a Crystal
          5. 6.8.3.4.5 Testing
          6. 6.8.3.4.6 Common Problems and Debug Tips
          7. 6.8.3.4.7 Crystal Oscillator Specifications
            1. 6.8.3.4.7.1 Crystal Oscillator Electrical Characteristics
            2. 6.8.3.4.7.2 Crystal Equivalent Series Resistance (ESR) Requirements
        5. 6.8.3.5 Internal Oscillators
          1. 6.8.3.5.1 Internal Oscillator Electrical Characteristics
      4. 6.8.4  Flash Parameters
        1. 6.8.4.1 Flash Parameters
      5. 6.8.5  RAM Specifications
      6. 6.8.6  ROM Specifications
      7. 6.8.7  Emulation/JTAG
        1. 6.8.7.1 JTAG Electrical Data and Timing
          1. 6.8.7.1.1 JTAG Timing Requirements
          2. 6.8.7.1.2 JTAG Switching Characteristics
      8. 6.8.8  GPIO Electrical Data and Timing
        1. 6.8.8.1 GPIO - Output Timing
          1. 6.8.8.1.1 General-Purpose Output Switching Characteristics
        2. 6.8.8.2 GPIO - Input Timing
          1. 6.8.8.2.1 General-Purpose Input Timing Requirements
        3. 6.8.8.3 Sampling Window Width for Input Signals
      9. 6.8.9  Interrupts
        1. 6.8.9.1 External Interrupt (XINT) Electrical Data and Timing
          1. 6.8.9.1.1 External Interrupt Timing Requirements
          2. 6.8.9.1.2 External Interrupt Switching Characteristics
      10. 6.8.10 Low-Power Modes
        1. 6.8.10.1 Clock-Gating Low-Power Modes
        2. 6.8.10.2 Power-Gating Low-Power Modes
        3. 6.8.10.3 Low-Power Mode Wakeup Timing
          1. 6.8.10.3.1 IDLE Mode Timing Requirements
          2. 6.8.10.3.2 IDLE Mode Switching Characteristics
          3. 6.8.10.3.3 STANDBY Mode Timing Requirements
          4. 6.8.10.3.4 STANDBY Mode Switching Characteristics
          5. 6.8.10.3.5 HALT Mode Timing Requirements
          6. 6.8.10.3.6 HALT Mode Switching Characteristics
          7. 6.8.10.3.7 HIBERNATE Mode Timing Requirements
          8. 6.8.10.3.8 HIBERNATE Mode Switching Characteristics
      11. 6.8.11 External Memory Interface (EMIF)
        1. 6.8.11.1 Asynchronous Memory Support
        2. 6.8.11.2 Synchronous DRAM Support
        3. 6.8.11.3 EMIF Electrical Data and Timing
          1. 6.8.11.3.1 Asynchronous RAM
            1. 6.8.11.3.1.1 EMIF Asynchronous Memory Timing Requirements
            2. 6.8.11.3.1.2 EMIF Asynchronous Memory Switching Characteristics
          2. 6.8.11.3.2 Synchronous RAM
            1. 6.8.11.3.2.1 EMIF Synchronous Memory Timing Requirements
            2. 6.8.11.3.2.2 EMIF Synchronous Memory Switching Characteristics
    9. 6.9  Analog Peripherals
      1. 6.9.1 Analog-to-Digital Converter (ADC)
        1. 6.9.1.1 ADC Configurability
          1. 6.9.1.1.1 Signal Mode
        2. 6.9.1.2 ADC Electrical Data and Timing
          1. 6.9.1.2.1 ADC Operating Conditions (16-Bit Differential Mode)
          2. 6.9.1.2.2 ADC Characteristics (16-Bit Differential Mode)
          3. 6.9.1.2.3 ADC Operating Conditions (12-Bit Single-Ended Mode)
          4. 6.9.1.2.4 ADC Characteristics (12-Bit Single-Ended Mode)
          5. 6.9.1.2.5 ADCEXTSOC Timing Requirements
          6. 6.9.1.2.6 ADC Input Models
            1. 6.9.1.2.6.1 Differential Input Model Parameters
            2. 6.9.1.2.6.2 Single-Ended Input Model Parameters
          7. 6.9.1.2.7 ADC Timing Diagrams
            1. 6.9.1.2.7.1 ADC Timings in 12-Bit Mode (SYSCLK Cycles)
            2. 6.9.1.2.7.2 ADC Timings in 16-Bit Mode
        3. 6.9.1.3 Temperature Sensor Electrical Data and Timing
          1. 6.9.1.3.1 Temperature Sensor Electrical Characteristics
      2. 6.9.2 Comparator Subsystem (CMPSS)
        1. 6.9.2.1 CMPSS Electrical Data and Timing
          1. 6.9.2.1.1 Comparator Electrical Characteristics
          2. 6.9.2.1.2 CMPSS DAC Static Electrical Characteristics
      3. 6.9.3 Buffered Digital-to-Analog Converter (DAC)
        1. 6.9.3.1 Buffered DAC Electrical Data and Timing
          1. 6.9.3.1.1 Buffered DAC Electrical Characteristics
        2. 6.9.3.2 CMPSS DAC Dynamic Error
    10. 6.10 Control Peripherals
      1. 6.10.1 Enhanced Capture (eCAP)
        1. 6.10.1.1 eCAP Electrical Data and Timing
          1. 6.10.1.1.1 eCAP Timing Requirement
          2. 6.10.1.1.2 eCAP Switching Characteristics
      2. 6.10.2 Enhanced Pulse Width Modulator (ePWM)
        1. 6.10.2.1 Control Peripherals Synchronization
        2. 6.10.2.2 ePWM Electrical Data and Timing
          1. 6.10.2.2.1 ePWM Timing Requirements
          2. 6.10.2.2.2 ePWM Switching Characteristics
          3. 6.10.2.2.3 Trip-Zone Input Timing
            1. 6.10.2.2.3.1 Trip-Zone Input Timing Requirements
        3. 6.10.2.3 External ADC Start-of-Conversion Electrical Data and Timing
          1. 6.10.2.3.1 External ADC Start-of-Conversion Switching Characteristics
      3. 6.10.3 Enhanced Quadrature Encoder Pulse (eQEP)
        1. 6.10.3.1 eQEP Electrical Data and Timing
          1. 6.10.3.1.1 eQEP Timing Requirements
          2. 6.10.3.1.2 eQEP Switching Characteristics
      4. 6.10.4 High-Resolution Pulse Width Modulator (HRPWM)
        1. 6.10.4.1 HRPWM Electrical Data and Timing
          1. 6.10.4.1.1 High-Resolution PWM Timing Requirements
          2. 6.10.4.1.2 High-Resolution PWM Characteristics
      5. 6.10.5 Sigma-Delta Filter Module (SDFM)
        1. 6.10.5.1 SDFM Electrical Data and Timing (Using ASYNC)
          1. 6.10.5.1.1 SDFM Timing Requirements When Using Asynchronous GPIO (ASYNC) Option
        2. 6.10.5.2 SDFM Electrical Data and Timing (Using 3-Sample GPIO Input Qualification)
          1. 6.10.5.2.1 SDFM Timing Requirements When Using GPIO Input Qualification (3-Sample Window) Option
    11. 6.11 Communications Peripherals
      1. 6.11.1 Controller Area Network (CAN)
      2. 6.11.2 Inter-Integrated Circuit (I2C)
        1. 6.11.2.1 I2C Electrical Data and Timing
          1. 6.11.2.1.1 I2C Timing Requirements
          2. 6.11.2.1.2 I2C Switching Characteristics
          3. 6.11.2.1.3 I2C Timing Diagram
      3. 6.11.3 Multichannel Buffered Serial Port (McBSP)
        1. 6.11.3.1 McBSP Electrical Data and Timing
          1. 6.11.3.1.1 McBSP Transmit and Receive Timing
            1. 6.11.3.1.1.1 McBSP Timing Requirements
            2. 6.11.3.1.1.2 McBSP Switching Characteristics
          2. 6.11.3.1.2 McBSP as SPI Master or Slave Timing
            1. 6.11.3.1.2.1 McBSP as SPI Master Timing Requirements
            2. 6.11.3.1.2.2 McBSP as SPI Master Switching Characteristics
            3. 6.11.3.1.2.3 McBSP as SPI Slave Timing Requirements
            4. 6.11.3.1.2.4 McBSP as SPI Slave Switching Characteristics
      4. 6.11.4 Serial Communications Interface (SCI)
      5. 6.11.5 Serial Peripheral Interface (SPI)
        1. 6.11.5.1 SPI Electrical Data and Timing
          1. 6.11.5.1.1 SPI Master Mode Timings
            1. 6.11.5.1.1.1 SPI Master Mode Timing Requirements
            2. 6.11.5.1.1.2 SPI Master Mode Switching Characteristics (Clock Phase = 0)
            3. 6.11.5.1.1.3 SPI Master Mode Switching Characteristics (Clock Phase = 1)
          2. 6.11.5.1.2 SPI Slave Mode Timings
            1. 6.11.5.1.2.1 SPI Slave Mode Timing Requirements
            2. 6.11.5.1.2.2 SPI Slave Mode Switching Characteristics
      6. 6.11.6 Universal Serial Bus (USB) Controller
        1. 6.11.6.1 USB Electrical Data and Timing
          1. 6.11.6.1.1 USB Input Ports DP and DM Timing Requirements
          2. 6.11.6.1.2 USB Output Ports DP and DM Switching Characteristics
      7. 6.11.7 Universal Parallel Port (uPP) Interface
        1. 6.11.7.1 uPP Electrical Data and Timing
          1. 6.11.7.1.1 uPP Timing Requirements
          2. 6.11.7.1.2 uPP Switching Characteristics
  8. 7 Detailed Description
    1. 7.1  Overview
    2. 7.2  Functional Block Diagram
    3. 7.3  Memory
      1. 7.3.1 C28x Memory Map
      2. 7.3.2 Flash Memory Map
      3. 7.3.3 EMIF Chip Select Memory Map
      4. 7.3.4 Peripheral Registers Memory Map
      5. 7.3.5 Memory Types
        1. 7.3.5.1 Dedicated RAM (Mx and Dx RAM)
        2. 7.3.5.2 Local Shared RAM (LSx RAM)
        3. 7.3.5.3 Global Shared RAM (GSx RAM)
        4. 7.3.5.4 CPU Message RAM (CPU MSGRAM)
        5. 7.3.5.5 CLA Message RAM (CLA MSGRAM)
    4. 7.4  Identification
    5. 7.5  Bus Architecture – Peripheral Connectivity
    6. 7.6  C28x Processor
      1. 7.6.1 Floating-Point Unit
      2. 7.6.2 Trigonometric Math Unit
      3. 7.6.3 Viterbi, Complex Math, and CRC Unit II (VCU-II)
    7. 7.7  Control Law Accelerator
    8. 7.8  Direct Memory Access
    9. 7.9  Interprocessor Communication Module
    10. 7.10 Boot ROM and Peripheral Booting
      1. 7.10.1 EMU Boot or Emulation Boot
      2. 7.10.2 WAIT Boot Mode
      3. 7.10.3 Get Mode
      4. 7.10.4 Peripheral Pins Used by Bootloaders
    11. 7.11 Dual Code Security Module
    12. 7.12 Timers
    13. 7.13 Nonmaskable Interrupt With Watchdog Timer (NMIWD)
    14. 7.14 Watchdog
  9. 8 Applications, Implementation, and Layout
    1. 8.1 Application and Implementation
    2. 8.2 Key Device Features
    3. 8.3 Application Information
      1. 8.3.1 Typical Application
        1. 8.3.1.1 Solar Micro Inverter
          1. 8.3.1.1.1 System Block Diagram
          2. 8.3.1.1.2 Solar Micro Inverter Resources
        2. 8.3.1.2 On-Board Charger (OBC)
          1. 8.3.1.2.1 System Block Diagram
          2. 8.3.1.2.2 OBC Resources
        3. 8.3.1.3 EV Charging Station Power Module
          1. 8.3.1.3.1 System Block Diagram
          2. 8.3.1.3.2 EV Charging Station Power Module Resources
  10. 9 Device and Documentation Support
    1. 9.1 Device and Development Support Tool Nomenclature
    2. 9.2 Markings
    3. 9.3 Tools and Software
    4. 9.4 Documentation Support
    5. 9.5 Support Resources
    6. 9.6 Trademarks
    7. 9.7 Electrostatic Discharge Caution
    8. 9.8 Export Control Notice
    9. 9.9 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information
    1. 11.1 Packaging Information
6.8.3.4.2.1.2 XTAL Output on XCLKOUT

The output of the electrical oscillator that is fed to the rest of the chip can be brought out on XCLKOUT for observation by configuring the CLKSRCCTL3.XCLKOUTSEL and XCLKOUTDIVSEL.XCLKOUTDIV registers. See the GPIO Muxed Pins table for a list of GPIOs that XCLKOUT comes out on.