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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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6.1.5.1. GPIO Intel® FPGA IP Data Paths
Figure 34. High-Level View of Single-Ended GPIO
Data Path | Register Mode | |||
---|---|---|---|---|
Bypass | Simple Register | DDR I/O | ||
Full-Rate | Half-Rate | |||
Input | Data goes from the delay element to the core, bypassing all double data rate I/Os (DDIOs). | The full-rate DDIO operates as a simple register, bypassing half-rate DDIOs. The Fitter chooses whether to pack the register in the I/O or implement the register in the core, depending on the area and timing trade-offs. | The full-rate DDIO operates as a regular DDIO, bypassing the half-rate DDIOs. | The full-rate DDIO operates as a regular DDIO. The half-rate DDIOs convert full-rate data to half-rate data. |
Output | Data goes from the core straight to the delay element, bypassing all DDIOs. | The full-rate DDIO operates as a simple register, bypassing half-rate DDIOs. The Fitter chooses whether to pack the register in the I/O or implement the register in the core, depending on the area and timing trade-offs. | The full-rate DDIO operates as a regular DDIO, bypassing the half-rate DDIOs. | The full-rate DDIO operates as a regular DDIO. The half-rate DDIOs convert full-rate data to half-rate data. |
Bidirectional | The output buffer drives both an output pin and an input buffer. | The full-rate DDIO operates as a simple register. The output buffer drives both an output pin and an input buffer. | The full-rate DDIO operates as a regular DDIO. The output buffer drives both an output pin and an input buffer. The input buffer drives a set of three flip-flops. | The full-rate DDIO operates as a regular DDIO. The half-rate DDIOs convert full-rate data to half-rate. The output buffer drives both an output pin and an input buffer. The input buffer drives a set of three flip-flops. |
If you use asynchronous clear and preset signals, all DDIOs share these same signals.
Half-rate and full-rate DDIOs connect to separate clocks. When you use half-rate and full-rate DDIOs, the full-rate clock must run at twice the half-rate frequency. You can use different phase relationships to meet timing requirements.