SPRUJH0B April   2025  – September 2025

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
      1. 1.3.1 External Power Supply or Accessory Requirements
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 Hardware Description
      1. 2.1.1 Functional Description and Connections
        1. 2.1.1.1 Power Domains
        2. 2.1.1.2 LEDs
        3. 2.1.1.3 Encoder Connectors
        4. 2.1.1.4 Boot Modes
        5. 2.1.1.5 BoosterPack Sites
        6. 2.1.1.6 Analog Voltage Reference
        7. 2.1.1.7 Other Headers and Jumpers
          1. 2.1.1.7.1 USB Isolation Block
          2. 2.1.1.7.2 Alternate Power
          3. 2.1.1.7.3 5V Step-up Converter
        8. 2.1.1.8 Programmable Gain Amplifier (PGA)
      2. 2.1.2 Debug Interface
        1. 2.1.2.1 XDS110 Debug Probe
        2. 2.1.2.2 Virtual COM Port
      3. 2.1.3 Alternate Routing
        1. 2.1.3.1 Overview
        2. 2.1.3.2 GPIO35/GPIO37 Routing
        3. 2.1.3.3 eQEP Routing
        4. 2.1.3.4 X1, X2 Routing
        5. 2.1.3.5 PWM DAC
    2. 2.2 Using the F28E12x LaunchPad
    3. 2.3 BoosterPacks
    4. 2.4 Hardware Revisions
      1. 2.4.1 Revision A
      2. 2.4.2 Revision E2
  9. 3Software
    1. 3.1 Software Development
      1. 3.1.1 Software Tools and Packages
      2. 3.1.2 F28E12x LaunchPad Demo Program
      3. 3.1.3 Programming and Running Other Software on the F28E12x LaunchPad
  10. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 PCB Layout
      1. 4.2.1 LAUNCHXL-F28E12X Board Dimensions
    3. 4.3 Bill of Materials (BOM)
  11. 5Additional Information
    1. 5.1 Frequently Asked Questions
    2. 5.2 Trademarks
  12. 6References
    1. 6.1 Reference Documents
    2. 6.2 Other TI Components Used in This Design
  13. 7Revision History

2.1.3.5 PWM DAC

In addition to the buffered DAC output available on BP pin 30, the F28E12x LaunchPad provides up to two PWM DAC signals at the BoosterPack headers using GPIO0 (BP pin 40) and GPIO1 (BP pin 39). The intended purpose of the PWM DAC signals are to utilize PWMs of the F28E12x device as digital-to-analog converters (DAC). This method involves low-pass filtering the PWM signal to remove the high-frequency components and leave only the DC component. For more information, see the Using PWM Output as a Digital-to-Analog Converter on a TMS320F280x Digital Signal Control.

By default, the RC filter is not populated. Instead a 0 ohm resistor is populated and the capacitor is left un-populated.