F-Tile JESD204B Intel® FPGA IP User Guide

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ID 723907
Date 4/23/2024
Public
Document Table of Contents
Document Table of Contents x
1. F-Tile JESD204B IP Quick Reference 2. About the F-Tile JESD204B Intel® FPGA IP 3. Getting Started 4. F-Tile JESD204B IP Functional Description 5. F-Tile JESD204B IP Deterministic Latency Implementation Guidelines 6. F-Tile JESD204B IP Debug Guidelines 7. F-Tile JESD204B Intel FPGA IP User Guide Archives 8. Document Revision History for the F-Tile JESD204B Intel® FPGA IP User Guide
2. About the F-Tile JESD204B Intel® FPGA IP x
2.1. Release Information 2.2. Device Family Support 2.3. Datapath Modes 2.4. IP Variation 2.5. F-Tile JESD204B IP Configuration 2.6. Channel Bonding 2.7. Performance and Resource Utilization
3. Getting Started x
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. F-Tile JESD204B IP Design Considerations 3.8. F-Tile JESD204B Intel® FPGA IP Parameters 3.9. F-Tile JESD204B IP Component Files
3.6. Design Walkthrough x
3.6.1. Creating a New Quartus® Prime Project 3.6.2. Parameterizing and Generating the IP 3.6.3. Compiling the F-Tile JESD204B IP Core Design 3.6.4. Programming an FPGA Device
3.7. F-Tile JESD204B IP Design Considerations x
3.7.1. Integrating the F-Tile JESD204B IP in Platform Designer 3.7.2. Pin Assignments 3.7.3. Adding External System PLL
4. F-Tile JESD204B IP Functional Description x
4.1. Transmitter 4.2. Receiver 4.3. Operation 4.4. Clocking Scheme 4.5. Reset Scheme 4.6. Signals 4.7. Registers
4.1. Transmitter x
4.1.1. TX Data Link Layer 4.1.2. TX PHY Layer
4.1.1. TX Data Link Layer x
4.1.1.1. TX CGS 4.1.1.2. TX ILAS 4.1.1.3. User Data Phase
4.2. Receiver x
4.2.1. RX Data Link Layer 4.2.2. RX PHY Layer
4.2.1. RX Data Link Layer x
4.2.1.1. RX CGS 4.2.1.2. Frame Synchronization 4.2.1.3. Frame Alignment 4.2.1.4. Lane Alignment 4.2.1.5. ILAS Data 4.2.1.6. Initial Lane Synchronization
4.3. Operation x
4.3.1. Operating Modes 4.3.2. Scrambler/Descrambler 4.3.3. SYNC_N Signal 4.3.4. Link Reinitialization 4.3.5. Link Startup Sequence 4.3.6. Error Reporting Through SYNC_N Signal
4.3.1. Operating Modes x
4.3.1.1. Subclass 0 Operating Mode 4.3.1.2. Subclass 1 Operating Mode 4.3.1.3. Subclass 2 Operating Mode
4.4. Clocking Scheme x
4.4.1. Device Clock 4.4.2. Link Clock 4.4.3. Local MultiFrame Clock 4.4.4. Clock Correlation 4.4.5. System PLL Clock
4.5. Reset Scheme x
4.5.1. Reset Sequence 4.5.2. ADC–FPGA Subsystem Reset Sequence 4.5.3. FPGA–DAC Subsystem Reset Sequence
4.6. Signals x
4.6.1. Transmitter Signals 4.6.2. Receiver Signals
4.7. Registers x
4.7.1. Register Access Type Convention 4.7.2. Register Map and Definition 4.7.3. Transmitter Registers 4.7.4. Receiver Registers
5. F-Tile JESD204B IP Deterministic Latency Implementation Guidelines x
5.1. Constraining Incoming SYSREF Signal 5.2. Programmable RBD Offset 5.3. Programmable LMFC Offset 5.4. Maintaining Deterministic Latency during Link Reinitialization
6. F-Tile JESD204B IP Debug Guidelines x
6.1. Clocking Scheme 6.2. F-Tile JESD204B Parameters 6.3. SPI Programming 6.4. Converter and FPGA Operating Conditions 6.5. Signal Polarity and FPGA Pin Assignment
1. F-Tile JESD204B IP Quick Reference
2. About the F-Tile JESD204B Intel® FPGA IP
3. Getting Started
4. F-Tile JESD204B IP Functional Description
5. F-Tile JESD204B IP Deterministic Latency Implementation Guidelines
6. F-Tile JESD204B IP Debug Guidelines
7. F-Tile JESD204B Intel FPGA IP User Guide Archives
8. Document Revision History for the F-Tile JESD204B Intel® FPGA IP User Guide

4.4.1. Device Clock

In a converter device, the sampling clock is typically the device clock.

For the F-Tile JESD204B IP in an FPGA logic device, you need two reference clocks as shown in the JESD204B Subsystem with Separate Transceiver Reference Clock and Core Clock figure. In the dual reference clock design, the device clock is used as the core PLL reference clock and the other reference clock is used as the transceiver PLL reference clock and system PLL reference clock. The available frequency depends on the PLL type, bonding option, number of lanes, and device family. During IP core generation, the Quartus® Prime software recommends the available reference frequency for the transceiver PLL and core PLL based on user selection.

Note: Due to the clock network architecture in the FPGA, Intel recommends that you use the device clock to generate the link clock and use the link clock as the timing reference. You need to use the IOPLL Intel® FPGA IP core to generate the link clock and frame clock. The link clock is used in the F-Tile JESD204B IP (MAC) and the transport layer. You are recommended to supply the reference clock source through a dedicated reference clock pin.

Based on the JESD204B specification for Subclass 1, the device clock is the timing reference and is source synchronous with SYSREF. To achieve deterministic latency, match the board trace length of the SYSREF signal with the device clock. Maintain a constant phase relationship between the device clock and SYSREF signal pairs going to the FPGA and converter devices. Ideally, the SYSREF pulses from the clock generator should arrive at the FPGA and converter devices at the same time. To avoid half link clock latency variation, you must supply the device clock at the same frequency as the link clock.

The JESD204B protocol does not support rate matching. Therefore, you must ensure that the TX or RX device clock (pll_ref_clk) and the PLL reference clock that generates link clock (txlink_clk or rxlink_clk) and frame clock (txframe_clk or rxframe_clk) have 0 ppm variation. Both PLL reference clocks should come from the same clock chip.

Figure 17. JESD204B Subsystem with Separate Transceiver Reference Clock and Core Clock
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