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1. Agilex™ 7 F-Series and I-Series General-Purpose I/O Overview
2. Agilex™ 7 F-Series and I-Series GPIO Banks
3. Agilex™ 7 F-Series and I-Series HPS I/O Banks
4. Agilex™ 7 F-Series and I-Series SDM I/O Banks
5. Agilex™ 7 F-Series and I-Series I/O Troubleshooting Guidelines
6. Agilex™ 7 F-Series and I-Series General-Purpose I/O IPs
7. Programmable I/O Features Description
8. Agilex™ 7 General-Purpose I/O User Guide: F-Series and I-Series User Guide Archives
9. Documentation Related to the Agilex™ 7 General-Purpose I/O User Guide: F-Series and I-Series
10. Document Revision History for the Agilex™ 7 General-Purpose I/O User Guide: F-Series and I-Series
2.5.1. VREF Sources and VREF Pins
2.5.2. I/O Standards Implementation Based on VCCIO_PIO Voltages
2.5.3. OCT Calibration Block Requirement
2.5.4. I/O Pins Placement Requirements
2.5.5. I/O Standard Selection and I/O Bank Supply Compatibility Check
2.5.6. Simultaneous Switching Noise
2.5.7. Special Pins Requirement
2.5.8. External Memory Interface Pin Placement Requirements
2.5.9. HPS Shared I/O Requirements
2.5.10. Clocking Requirements
2.5.11. SDM Shared I/O Requirements
2.5.12. Unused Pins
2.5.13. Voltage Setting for Unused GPIO Banks
2.5.14. GPIO Pins During Power Sequencing
2.5.15. Drive Strength Requirement for GPIO Input Pins
2.5.16. Maximum DC Current Restrictions
2.5.17. 1.2 V I/O Interface Voltage Level Compatibility
2.5.18. GPIO Pins for the Avalon® Streaming Interface Configuration Scheme
2.5.19. Maximum True Differential Signaling Receiver Pairs Per I/O Lane
6.1.1. Release Information for GPIO Intel® FPGA IP
6.1.2. Generating the GPIO Intel® FPGA IP
6.1.3. GPIO Intel® FPGA IP Parameter Settings
6.1.4. GPIO Intel® FPGA IP Interface Signals
6.1.5. GPIO Intel® FPGA IP Architecture
6.1.6. Verifying Resource Utilization and Design Performance
6.1.7. GPIO Intel® FPGA IP Timing
6.1.8. GPIO Intel® FPGA IP Design Examples
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2.4.1.1. Single-Ended I/O Standards On-Chip Termination
Serial (RS) and parallel (RT) OCT provides I/O impedance matching and termination capabilities. OCT maintains signal quality, saves board space, and reduces external component costs.
The OCT calibration circuit uses the impedance of the external resistor that is connected to the RZQ pin as reference. During calibration, the circuit continuously alters the impedance of the I/O buffer until the impedance reaches a predetermined ratio to the reference resistance.
Direction | OCT Scheme |
---|---|
Output | RS OCT with calibration |
RS OCT without calibration | |
Input | RT OCT with calibration |
Bidirectional | Dynamic RS and RT OCT |