SBAA607A December   2023  – January 2024 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1 , AM263P4 , AMC1303M2520 , AMC1305L25 , AMC1306M25 , TMS320F280033 , TMS320F280034 , TMS320F280034-Q1 , TMS320F280036-Q1 , TMS320F280036C-Q1 , TMS320F280037 , TMS320F280037-Q1 , TMS320F280037C , TMS320F280037C-Q1 , TMS320F280038-Q1 , TMS320F280038C-Q1 , TMS320F280039 , TMS320F280039-Q1 , TMS320F280039C , TMS320F280039C-Q1 , TMS320F280040-Q1 , TMS320F280040C-Q1 , TMS320F280041 , TMS320F280041-Q1 , TMS320F280041C , TMS320F280041C-Q1 , TMS320F280045 , TMS320F280048-Q1 , TMS320F280048C-Q1 , TMS320F280049 , TMS320F280049-Q1 , TMS320F280049C , TMS320F280049C-Q1 , TMS320F28075 , TMS320F28075-Q1 , TMS320F28076 , TMS320F28374D , TMS320F28374S , TMS320F28375D , TMS320F28375S , TMS320F28375S-Q1 , TMS320F28376D , TMS320F28376S , TMS320F28377D , TMS320F28377D-Q1 , TMS320F28377S , TMS320F28377S-Q1 , TMS320F28378D , TMS320F28378S , TMS320F28379D , TMS320F28379D-Q1 , TMS320F28379S , TMS320F28384D , TMS320F28384D-Q1 , TMS320F28384S , TMS320F28384S-Q1 , TMS320F28386D , TMS320F28386D-Q1 , TMS320F28386S , TMS320F28386S-Q1 , TMS320F28388D , TMS320F28388S , TMS320F28P650DH , TMS320F28P650DK , TMS320F28P650SH , TMS320F28P650SK , TMS320F28P659DK-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Design Challenge With Digital Interface Timing Specifications
  6. 3Design Approach With Clock Edge Delay Compensation
    1. 3.1 Clock Signal Compensation With Software Configurable Phase Delay
    2. 3.2 Clock Signal Compensation With Hardware Configurable Phase Delay
    3. 3.3 Clock Signal Compensation by Clock Return
    4. 3.4 Clock Signal Compensation by Clock Inversion at the MCU
  7. 4Test and Validation
    1. 4.1 Test Equipment and Software
    2. 4.2 Testing of Clock Signal Compensation With Software Configurable Phase Delay
      1. 4.2.1 Test Setup
      2. 4.2.2 Test Measurement Results
    3. 4.3 Testing of Clock Signal Compensation by Clock Inversion at MCU
      1. 4.3.1 Test Setup
      2. 4.3.2 Test Measurement Results
        1. 4.3.2.1 Test Result – No Clock Inversion of Clock Input at GPIO123
        2. 4.3.2.2 Test Result – Clock Inversion of Clock Input at GPIO123
    4. 4.4 Digital Interface Timing Validation by Calculation Tool
      1. 4.4.1 Digital Interface With No Compensation Method
      2. 4.4.2 Commonly Used Method - Reduction of the Clock Frequency
      3. 4.4.3 Clock Edge Compensation With Software Configurable Phase Delay
  8. 5Conclusion
  9. 6References
  10. 7Revision History

4.4 Digital Interface Timing Validation by Calculation Tool

A calculation tool was developed for simulation and validation purposes of the digital interface timings between an MCU and isolated Delta-Sigma modulators. The most common used isolated Delta-Sigma modulators AMC1306M25 and AMC1305L25 were selected for the digital interface timing analysis. AMC1305L25 has a LVDS interface type and requires LVDS driver and LVDS receiver when interfacing a MCU with CMOS interface. The MCU can be individually selected by the user, as only the setup and hold time requirements are entered into the calculation tool. In the following use of the calculation tool for the optimization of the digital interface timing between AMC1305L25 and C2000 MCU TMS320F28379D is shown step by step.