GTS Interlaken Intel® FPGA IP User Guide

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ID 819200
Date 3/31/2024
Public
Document Table of Contents
Document Table of Contents x
1. About the GTS Interlaken FPGA IP Core 2. Getting Started 3. Parameter Settings 4. Functional Description 5. Interface Signals 6. IP Registers A. GTS Interlaken FPGA IP User Guide Archives 7. Document Revision History for GTS Interlaken Intel FPGA IP User Guide
1. About the GTS Interlaken FPGA IP Core x
1.1. Features 1.2. Device Family Support 1.3. Device Speed Grade Support 1.4. Performance and Resource Utilization 1.5. Round-Trip Latency 1.6. Release Information
2. Getting Started x
2.1. Installing and Licensing Intel FPGA IPs 2.2. Generated File Structure 2.3. Specifying the IP Core Parameters and Options 2.4. Reference and System PLL CLock for Your IP Design 2.5. Simulating the IP Core 2.6. Compiling the Full Design and Programming the FPGA
2.1. Installing and Licensing Intel FPGA IPs x
2.1.1. Intel FPGA Evaluation Mode
4. Functional Description x
4.1. Data Path Flow 4.2. Modes of Operation 4.3. Performance 4.4. IP Reset 4.5. M20K ECC Support 4.6. Out-of-Band Flow Control
4.1. Data Path Flow x
4.1.1. Interlaken TX Path 4.1.2. Interlaken RX Path
4.1.1. Interlaken TX Path x
4.1.1.1. Transmit Path Blocks 4.1.1.2. In-Band Calendar Bits on Transmit Side
4.1.2. Interlaken RX Path x
4.1.2.1. Receive Path Blocks RX PCS RX MAC 4.1.2.2. In-Band Calendar Bits on Receive Side 4.1.2.3. RX Errored Packet Handling
4.1.2.3. RX Errored Packet Handling x
4.1.2.3.1. Example With Erroes and In-Band Calendar Bits
4.2. Modes of Operation x
4.2.1. Interleaved and Packet Modes 4.2.2. Multi-Segment Mode
4.2.1. Interleaved and Packet Modes x
4.2.1.1. Transmit User Data Interface Examples 4.2.1.2. Receive User Data Interface Examples
4.2.2. Multi-Segment Mode x
4.2.2.1. Multi-Segment Interface Example
5. Interface Signals x
5.1. Clock and Reset Interface Signals 5.2. Transmit User Interface Signals 5.3. Receive User Interface Signals 5.4. Management Interface Signals 5.5. Interlaken Link and Miscellaneous Signals
1. About the GTS Interlaken FPGA IP Core
2. Getting Started
3. Parameter Settings
4. Functional Description
5. Interface Signals
6. IP Registers
A. GTS Interlaken FPGA IP User Guide Archives
7. Document Revision History for GTS Interlaken Intel FPGA IP User Guide

4.1.2.1. Receive Path Blocks

The Interlaken IP core receive data path has the following four main functional blocks:
  • RX PCS
  • RX MAC

RX PCS

The FPGA soft logic implements RX PCS. In PAM4 mode, the IP core contains a soft logic transcoder block to work with RS FEC of the RX PMA. The Interlaken IP core RX PCS block performs the following functions to retrieve the data:
  • Detects word lock and word synchronization.
  • Checks running disparity.
  • Reverses gear-boxing and 64/67B encoding.
  • Descrambles the data.
  • Delineates meta frame boundaries.
  • Performs CRC32 checking.
  • Sends lane status information to the calendar and status blocks, if Include in-band flow control functionality is turned on.

RX MAC

To recover a packet or burst, the RX MAC takes data from each of the PCS lanes and reassembles the packet or burst. The Interlaken IP core RX MAC performs the following functions:
  • Data de-striping, including lane alignment and burst assembly from the PCS lanes.
  • CRC24 validation.
  • The 4th Point after the "turned on". The Interlaken IP core RX regroup block translates the IP core internal data format to the outgoing user application data irx_data format.
  • Calendar recovery, if Include in-band flow control functionality is turned on.
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