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

6.1. LVDS SERDES Intel® FPGA IP Timing

Use the Quartus® Prime software to generate the required timing constraint to perform proper timing analysis of the LVDS SERDES IP in Agilex™ 7 F-Series and I-Series devices.
Table 31.   LVDS SERDES IP Timing Components
Timing Component Description
Source Synchronous Paths

The source synchronous paths are paths where clock and data signals are passed from the transmitting devices to the receiving devices. For example:

  • FPGA/LVDS SERDES/transmitter to external receiving device
  • External transmitting device to FPGA/non-DPA mode/LVDS SERDES receiving path
Dynamic Phase Alignment Paths

A DPA block registers the I/O capture paths in soft-CDR and DPA-FIFO modes. The DPA block dynamically chooses the best phase from the PLL VCO clocks to latch the input data.

Internal FPGA Paths

The internal FPGA paths are the paths inside the FPGA fabric:

  • LVDS SERDES receiver hardware to core registers paths
  • Core registers to LVDS SERDES transmitter hardware paths
  • Others core registers to core registers path

The Timing Analyzer reports the corresponding timing margins.

Table 32.   LVDS SERDES IP Timing Constraint FilesThis table lists the timing files generated by the LVDS SERDES IP. Use these files for successful timing analysis of the LVDS SERDES IP. You can find these files in the <variation_name>/altera_lvds_core14_191/synth directory.
File Name Description

<variation_name>_altera_lvds_core14_191_<random_id>.sdc

This .sdc file allows the Quartus® Prime Fitter to optimize timing margins with timing-driven compilation. The file also allows the Timing Analyzer to analyze the timing of your design.

The IP uses the .sdc for the following operations:

  • Creating clocks on PLL inputs
  • Creating generated clocks
  • Calling derive_clock_uncertainty
  • Creating proper multi-cycle constraints

You can locate this file in the .qip generated during IP generation.

sdc_util.tcl This .tcl file is a library of functions and procedures that the .sdc uses.

Section Content
I/O Timing Analysis
FPGA Timing Analysis
Timing Analysis for the External PLL Mode

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