AN 967: Multiple Device Synchronization in Digital Phased Array System

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ID 734485
Date 12/15/2023
Public
Document Table of Contents
Document Table of Contents x
1. Introduction 2. Digital Phased Array Synchronization 3. Multiple Device Synchronization in DPA System 4. Test Result 5. Conclusion 6. Document Revision History for AN 967: Multiple Device Synchronization in Digital Phased Array System A. Appendix
3. Multiple Device Synchronization in DPA System x
3.1. JESD204(A/B/C) Interface 3.2. Clock/SYSREF Scheme 3.3. FPGA Design Synchronization 3.4. Data Exchange between FPGA Devices 3.5. Event Trigger Synchronization
3.2. Clock/SYSREF Scheme x
3.2.1. clk_ref 3.2.2. clk_dev and SYSREF 3.2.3. SYSREF Capture
3.3. FPGA Design Synchronization x
3.3.1. Data and SYSREF Clock Domain Crossing 3.3.2. Data Transformation when Clock Domain Crossing
3.5. Event Trigger Synchronization x
3.5.1. SYSREF Distribution
A. Appendix x
A.1. FPGA I/O Timing Constraints for SYSREF
A.1. FPGA I/O Timing Constraints for SYSREF x
A.1.1. Source-Synchronous Interface Timing Constraints A.1.2. SYSREF I/O Timing Closure
A.1.2. SYSREF I/O Timing Closure x
A.1.2.1. Adjust Input Delay Chain Value A.1.2.2. Using PLL to Adjust clk_dev Phase A.1.2.3. Place First SYSREF Capture Register in IOE
1. Introduction
2. Digital Phased Array Synchronization
3. Multiple Device Synchronization in DPA System
4. Test Result
5. Conclusion
6. Document Revision History for AN 967: Multiple Device Synchronization in Digital Phased Array System
A. Appendix

A.1.2. SYSREF I/O Timing Closure

If you apply the correct I/O timing constraints to SYSREF, the FPGA compiler intends to meet the I/O timing requirement during compilation. However, the I/O timing may still fail when the I/O timing requirement is difficult to meet. Consequently, you can adjust the input delay chain value manually, adjust the clk_dev phase by a PLL, or place the first stage SYSREF capture register in the IOE.

Section Content
Adjust Input Delay Chain Value
Using PLL to Adjust clk_dev Phase
Place First SYSREF Capture Register in IOE

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