LVDS SERDES Intel® FPGA IP User Guide: Intel® Arria® 10 and Intel® Cyclone® 10 GX Devices

Download PDF
ID 683520
Date 7/13/2021
Public

A newer version of this document is available. Customers should click here to go to the newest version.

Document Table of Contents
Document Table of Contents x
LVDS SERDES Intel® FPGA IP User Guide: Intel® Arria® 10 and Intel® Cyclone® 10 GX Devices
LVDS SERDES Intel® FPGA IP User Guide: Intel® Arria® 10 and Intel® Cyclone® 10 GX Devices x
Release Information LVDS SERDES IP Core Features LVDS SERDES IP Core Functional Modes LVDS SERDES IP Core Functional Description LVDS SERDES IP Core Initialization and Reset LVDS SERDES IP Core Signals LVDS SERDES IP Core Parameter Settings LVDS SERDES IP Core General Settings LVDS SERDES IP Core Timing LVDS SERDES IP Core Design Examples Additional LVDS SERDES IP Core References LVDS SERDES Intel FPGA IP User Guide Archives Document Revision History for LVDS SERDES Intel® FPGA IP User Guide: Intel® Arria® 10 and Intel® Cyclone® 10 GX Devices
LVDS SERDES IP Core Functional Description x
Serializer DPA FIFO Bitslip Deserializer
LVDS SERDES IP Core Initialization and Reset x
Initializing the LVDS SERDES IP Core in Non-DPA Mode Initializing the LVDS SERDES IP Core in DPA Mode Resetting the DPA Word Boundaries Alignment
Word Boundaries Alignment x
Aligning Word Boundaries
LVDS SERDES IP Core Parameter Settings x
LVDS SERDES IP Core PLL Settings LVDS SERDES IP Core Receiver Settings LVDS SERDES IP Core Transmitter Settings LVDS SERDES IP Core Clock Resource Summary
LVDS SERDES IP Core Receiver Settings x
Receiver Input Clock Parameters Setup
LVDS SERDES IP Core Transmitter Settings x
Setting the Transmitter Output Clock Parameters
LVDS SERDES IP Core Timing x
I/O Timing Analysis FPGA Timing Analysis Timing Analysis for the External PLL Mode Timing Closure Guidelines for Internal FPGA Paths
I/O Timing Analysis x
Obtaining RSKM Report Obtaining TCCS Report
LVDS SERDES IP Core Design Examples x
LVDS SERDES IP Core Synthesizable Intel® Quartus® Prime Design Examples LVDS SERDES IP Core Simulation Design Example Combined LVDS SERDES IP Core Transmitter and Receiver Design Example LVDS SERDES IP Core Dynamic Phase Shift Design Example
Additional LVDS SERDES IP Core References x
IP Migration Flow for Arria® V, Cyclone® V, and Stratix® V Devices LVDS Interface with External PLL Mode LVDS Transmitters and Receivers in the Same I/O Bank Comparison of LVDS SERDES IP Core with Stratix® V SERDES
IP Migration Flow for Arria® V, Cyclone® V, and Stratix® V Devices x
Migrating Your ALTLVDS_TX and ALTLVDS_RX IP Cores
LVDS Interface with External PLL Mode x
IOPLL IP Core Signal Interface with LVDS SERDES IP Core IOPLL Parameter Values for External PLL Mode Connection between IOPLL IP Core and LVDS SERDES IP Core in External PLL Mode
LVDS SERDES Intel® FPGA IP User Guide: Intel® Arria® 10 and Intel® Cyclone® 10 GX Devices

Timing Closure Guidelines for Internal FPGA Paths

Closing timing at the internal FPGA paths is challenging for an LVDS SERDES design with high frequency and low SERDES factor.

If you observe setup violation from core registers to LVDS transmitter hardware, check the TX core registers clock parameter:

  • If the parameter is set to inclock, consider changing it to tx_coreclock. Core registers that use tx_coreclock have less clock delay. Because of the PLL compensation delay on the tx_coreclock path, there is less source clock delay and more setup slack for the transfer.
  • If the parameter is set to tx_coreclock, consider lowering the data rate or increasing the SERDES factor to reduce the core frequency requirement and provide more setup slack.

If you observe hold violation from the LVDS receiver to core registers, consider checking the setup slack of the transfer. If there is ample setup slack, you can attempt to over-constraint the hold for the transfer. Normally, the Fitter attempts to correct the hold violation by adding delay. Under certain circumstances, the Fitter may have calculated that adding more delay for avoiding hold violation at the fast corner can negatively affect setup at the slow corner.

Level Two Title