1. GTS JESD204B IP Quick Reference
2. About the GTS JESD204B Intel® FPGA IP
3. Getting Started
4. GTS JESD204B IP Functional Description
5. GTS JESD204B IP Deterministic Latency Implementation Guidelines
6. GTS JESD204B IP Debug Guidelines
7. Document Revision History for the GTS JESD204B User Guide
3.1. Introduction to Intel® FPGA IP Cores
3.2. Installing and Licensing Intel® FPGA IP Cores
3.3. Intel® FPGA IP Evaluation Mode
3.4. Upgrading IP Cores
3.5. IP Catalog and Parameter Editor
3.6. Design Walkthrough
3.7. GTS JESD204B IP Design Considerations
3.8. GTS JESD204B IP Parameters
3.9. Analog Parameter Settings
3.10. GTS JESD204B IP Component Files
4.5.5. GTS Reset Sequencer Intel® FPGA IP Clock
Figure 18. GTS Reset Sequencer Intel® FPGA IP Interface Timing Diagram

req refers to request signal from the SRC to the GTS Reset Sequencer Intel® FPGA IP for reset operation. It asserts when there is a request to toggle reset.
The grant signal is from the GTS Reset Sequencer Intel® FPGA IP to the SRC. It asserts when the reset request is granted by the Reset Sequencer.
This signal handshake between req and grant is an internal process that operates without user intervention.