Agilex™ 7 LVDS SERDES User Guide: F-Series and I-Series

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ID 721819
Date 9/05/2024
Public
Document Table of Contents
Document Table of Contents x
1. Agilex™ 7 F-Series and I-Series LVDS SERDES Overview 2. Agilex™ 7 F-Series and I-Series LVDS SERDES Architecture 3. Agilex™ 7 F-Series and I-Series LVDS SERDES Transmitter 4. Agilex™ 7 F-Series and I-Series LVDS SERDES Receiver 5. Agilex™ 7 F-Series and I-Series High-Speed LVDS I/O Implementation Guide 6. Agilex™ 7 F-Series and I-Series LVDS SERDES Timing 7. LVDS SERDES Intel® FPGA IP Design Examples 8. Agilex™ 7 F-Series and I-Series LVDS SERDES Design Guidelines 9. Agilex™ 7 F-Series and I-Series LVDS SERDES Troubleshooting Guidelines 10. Documentation Related to the Agilex™ 7 LVDS SERDES User Guide: F-Series and I-Series 11. Document Revision History for the Agilex™ 7 LVDS SERDES User Guide: F-Series and I-Series
1. Agilex™ 7 F-Series and I-Series LVDS SERDES Overview x
1.1. LVDS SERDES Usage Modes
2. Agilex™ 7 F-Series and I-Series LVDS SERDES Architecture x
2.1. F-Series and I-Series GPIO Banks, SERDES, and DPA Locations 2.2. SERDES Blocks, Modes, and Clock Domains
3. Agilex™ 7 F-Series and I-Series LVDS SERDES Transmitter x
3.1. LVDS SERDES Transmitter Blocks 3.2. Serializer 3.3. Differential I/O Bit Position 3.4. Clocking the Differential Transmitters
3.2. Serializer x
3.2.1. Serializer Bypass for DDR and SDR Operations
3.4. Clocking the Differential Transmitters x
3.4.1. Transmitter Output Clock Parameters Settings
3.4.1. Transmitter Output Clock Parameters Settings x
3.4.1.1. Edge-Aligned tx_outclock to tx_out 3.4.1.2. Center-Aligned tx_outclock to tx_out
4. Agilex™ 7 F-Series and I-Series LVDS SERDES Receiver x
4.1. LVDS SERDES Receiver Blocks 4.2. Clocking the LVDS SERDES Receivers 4.3. LVDS SERDES Receiver Modes
4.1. LVDS SERDES Receiver Blocks x
4.1.1. Dynamic Phase Alignment Block 4.1.2. Synchronizer (DPA FIFO) 4.1.3. Data Realignment Block (Bit Slip) 4.1.4. Deserializer
4.2. Clocking the LVDS SERDES Receivers x
4.2.1. Receiver Input Clock Parameters Settings
4.2.1. Receiver Input Clock Parameters Settings x
4.2.1.1. Edge-Aligned inclock to rx_in 4.2.1.2. Center-Aligned inclock to rx_in
4.3. LVDS SERDES Receiver Modes x
4.3.1. Non-DPA Mode 4.3.2. DPA Mode 4.3.3. Soft-CDR Mode
5. Agilex™ 7 F-Series and I-Series High-Speed LVDS I/O Implementation Guide x
5.1. LVDS SERDES Intel® FPGA IP 5.2. LVDS Interface with External PLL Mode 5.3. LVDS SERDES IP Initialization and Reset
5.1. LVDS SERDES Intel® FPGA IP x
5.1.1. Release Information 5.1.2. LVDS SERDES Intel® FPGA IP Features 5.1.3. LVDS SERDES IP Usage Modes 5.1.4. Generating the LVDS SERDES Intel® FPGA IP 5.1.5. LVDS SERDES Intel® FPGA IP Parameter Settings 5.1.6. LVDS SERDES Intel® FPGA IP Signals
5.1.4. Generating the LVDS SERDES Intel® FPGA IP x
5.1.4.1. Intel® FPGA IP Generation Output
5.1.5. LVDS SERDES Intel® FPGA IP Parameter Settings x
5.1.5.1. LVDS SERDES Intel® FPGA IP General Settings 5.1.5.2. LVDS SERDES Intel® FPGA IP PLL Settings 5.1.5.3. LVDS SERDES Intel® FPGA IP Receiver Settings 5.1.5.4. LVDS SERDES Intel® FPGA IP Transmitter Settings 5.1.5.5. LVDS SERDES Intel® FPGA IP Clock Resource Summary
5.2. LVDS Interface with External PLL Mode x
5.2.1. IOPLL IP Signal Interface with LVDS SERDES IP 5.2.2. IOPLL Parameter Values for External PLL Mode 5.2.3. Connection between IOPLL IP and LVDS SERDES IP in External PLL Mode
5.3. LVDS SERDES IP Initialization and Reset x
5.3.1. Initializing the LVDS SERDES IP in Non-DPA Mode 5.3.2. Initializing the LVDS SERDES IP in DPA Mode 5.3.3. Resetting the DPA 5.3.4. Word Boundaries Alignment
5.3.4. Word Boundaries Alignment x
5.3.4.1. Aligning Word Boundaries
6. Agilex™ 7 F-Series and I-Series LVDS SERDES Timing x
6.1. LVDS SERDES Intel® FPGA IP Timing 6.2. LVDS SERDES Source-Synchronous Timing Budget
6.1. LVDS SERDES Intel® FPGA IP Timing x
6.1.1. I/O Timing Analysis 6.1.2. FPGA Timing Analysis 6.1.3. Timing Analysis for the External PLL Mode
6.1.1. I/O Timing Analysis x
6.1.1.1. Obtaining RSKM Report 6.1.1.2. Obtaining TCCS Report
6.2. LVDS SERDES Source-Synchronous Timing Budget x
6.2.1. Transmitter Channel-to-Channel Skew 6.2.2. Receiver Skew Margin
7. LVDS SERDES Intel® FPGA IP Design Examples x
7.1. LVDS SERDES IP Synthesizable Quartus® Prime Design Examples 7.2. LVDS SERDES IP Simulation Design Example
8. Agilex™ 7 F-Series and I-Series LVDS SERDES Design Guidelines x
8.1. Use PLLs in Integer PLL Mode for LVDS SERDES 8.2. Use High-Speed Clock from PLL to Clock SERDES Only 8.3. Pin Placement for Differential Channels 8.4. SERDES Pin Pairs for Soft-CDR Mode 8.5. Placing LVDS SERDES Transmitters and Receivers in the Same GPIO Bank
1. Agilex™ 7 F-Series and I-Series LVDS SERDES Overview
2. Agilex™ 7 F-Series and I-Series LVDS SERDES Architecture
3. Agilex™ 7 F-Series and I-Series LVDS SERDES Transmitter
4. Agilex™ 7 F-Series and I-Series LVDS SERDES Receiver
5. Agilex™ 7 F-Series and I-Series High-Speed LVDS I/O Implementation Guide
6. Agilex™ 7 F-Series and I-Series LVDS SERDES Timing
7. LVDS SERDES Intel® FPGA IP Design Examples
8. Agilex™ 7 F-Series and I-Series LVDS SERDES Design Guidelines
9. Agilex™ 7 F-Series and I-Series LVDS SERDES Troubleshooting Guidelines
10. Documentation Related to the Agilex™ 7 LVDS SERDES User Guide: F-Series and I-Series
11. Document Revision History for the Agilex™ 7 LVDS SERDES User Guide: F-Series and I-Series

6.2.1. Transmitter Channel-to-Channel Skew

The receiver skew margin calculation uses the transmitter channel-to-channel skew (TCCS)—an important parameter based on the FPGA transmitter in a source-synchronous differential interface:

  • TCCS is the difference between the fastest and slowest data output transitions, including the TCO variation and clock skew.
  • For SERDES transmitters, the Timing Analyzer provides the TCCS value in the TCCS report (report_TCCS) in the Quartus® Prime compilation report. The TCCS report lists the TCCS values for serial output ports.
  • You can also get the TCCS value from the device datasheet.

Perform PCB trace compensation to adjust the trace length of each SERDES channel to improve channel-to-channel skew when interfacing with non-DPA receivers at data rate above 840 Mbps.

The Quartus® Prime Fitter report lists the amount of delay you must add to each trace.

The Transmitter/Receiver Package Skew Compensation report lists the recommended trace delay numbers. Using these numbers, you can manually compensate the skew on the PCB board trace to reduce the channel-to-channel skew and meet the timing budget between the SERDES channels.

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