SPRUJ29A April   2022  – January 2023

 

  1.   F2800157 controlCARD Information Guide
  2.   Trademarks
  3. 1Introduction
  4. 2Hardware Quick Setup Guide
    1. 2.1 Configuration 1: Standalone
    2. 2.2 Configuration 2: External 5-V Supply
  5. 3Errata
    1. 3.1 Warnings, Notes, and Errata
    2. 3.2 Warnings About Specific controlCARD Revisions
  6. 4Getting Familiar with the controlCARD
    1. 4.1 F2800157 controlCARD Features
    2. 4.2 Assumed Operating Conditions
      1. 4.2.1 External Power Supply or Accessory Requirements
    3. 4.3 Using the controlCARD
    4. 4.4 Experimentation Software
  7. 5Special Notes
    1. 5.1 XDS110 Emulator and SCI (UART) Connectivity
    2. 5.2 Clocking Methodology
    3. 5.3 Evaluation of the Analog-to-Digital Converters (ADCs)
  8. 6Hardware References
  9. 7Revision History

5.2 Clocking Methodology

This controlCARD is required to support a broad range of TI's baseboards. Several designs rely on GPIO18 and GPIO19 for SPIA, while others require these GPIO to be utilized as a precision clock input source. To accommodate both of these systems, a switch (S3) has been added to the design. This methodology can not be used in a final system as this methodology increases EMI emissions and creates robustness susceptibilities. The system designer must choose the best way to implement the clocking circuity for a given system.