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1. Agilex™ 5 Clocking and PLL Overview
2. Agilex™ 5 Clocking and PLL Architecture and Features
3. Agilex™ 5 Clocking and PLL Design Considerations
4. Clock Control Intel® FPGA IP Core
5. IOPLL Intel® FPGA IP Core
6. I/O PLL Reconfiguration
7. Document Revision History for the Clocking and PLL User Guide: Agilex™ 5 FPGAs and SoCs
2.2.1. PLL Features
2.2.2. PLL Usage
2.2.3. PLL Locations
2.2.4. PLL Architecture
2.2.5. PLL Control Signals
2.2.6. PLL Feedback Modes
2.2.7. Clock Multiplication and Division
2.2.8. Programmable Phase Shift
2.2.9. Programmable Duty Cycle
2.2.10. PLL Cascading
2.2.11. PLL Input Clock Switchover
2.2.12. PLL Reconfiguration and Dynamic Phase Shift
2.2.13. PLL Calibration
3.1. Guidelines: Clock Switchover
3.2. Guidelines: Timing Closure
3.3. Guidelines: Resetting the PLL
3.4. Guidelines: Configuration Constraints
3.5. Clocking Constraints
3.6. IP Core Constraints
3.7. Guideline: Achieving 5% Duty Cycle for fOUT_EXT ≥ 300 MHz Using tx_outclk Port from LVDS SERDES Intel® FPGA IP
6.1. Release Information for EMIF Calibration IP
6.2. Implementing HSIO I/O PLL Reconfiguration using EMIF Calibration IP
6.3. Implementing HVIO I/O PLL Reconfiguration
6.4. Reconfiguration Guideline for I/O PLLs
6.5. Axilite Interface Ports in the EMIF Calibration IP
6.6. Address Bus and Data Bus Settings
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3.7. Guideline: Achieving 5% Duty Cycle for fOUT_EXT ≥ 300 MHz Using tx_outclk Port from LVDS SERDES Intel® FPGA IP
To achieve 5% duty cycle for fOUT_EXT ≥ 300 MHz, you can only use tx_outclk port from the LVDS SERDES Intel® FPGA IP. Refer to the following guidelines for the settings in the LVDS SERDES Intel® FPGA IP:
- In the General Setting tab, select TX as functional mode. For data rate, enter a value 2× of your desired frequency. As an example, if your desired frequency is 500 MHz, enter 1000 as data rate.
- In the PLL settings tab, set your desired input frequency.
- In the Transmitter Settings tab, enable tx_outclock port and select 2 as Tx_outclock division factor.