F-Tile Interlaken Intel® FPGA IP User Guide

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ID 683622
Date 1/14/2022
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Document Table of Contents
Document Table of Contents x
1. About the F-Tile Interlaken Intel® FPGA IP Core 2. Getting Started 3. Parameter Settings 4. Functional Description 5. Interface Signals 6. IP Registers 7. F-Tile Interlaken Intel® FPGA IP User Guide Archives 8. Document Revision History for F-Tile Interlaken Intel® FPGA IP User Guide
1. About the F-Tile Interlaken Intel® FPGA IP Core x
1.1. Features 1.2. Device Family Support 1.3. Performance and Resource Utilization 1.4. Round-trip Latency 1.5. Release Information
2. Getting Started x
2.1. Installing and Licensing Intel® FPGA IP Cores 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 IP Cores x
2.1.1. Intel® FPGA IP Evaluation Mode
2.4. Reference and System PLL Clock for your IP Design x
2.4.1. System PLL Configuration
4. Functional Description x
4.1. Data Path Flow 4.2. Interlaken Look-aside Data Path Flow 4.3. Modes of Operation 4.4. Performance 4.5. IP Reset 4.6. M20K ECC Support 4.7. 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 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 Errors and In-Band Calendar Bits
4.2. Interlaken Look-aside Data Path Flow x
4.2.1. Interlaken Look-aside TX Path 4.2.2. Interlaken Look-aside RX Path
4.2.1. Interlaken Look-aside TX Path x
4.2.1.1. Transmit Path Blocks TX MAC TX PCS TX PMA
4.2.2. Interlaken Look-aside RX Path x
4.2.2.1. Receive Path Blocks 4.2.2.2. RX Error Handling
4.3. Modes of Operation x
4.3.1. Interleaved and Packet Modes 4.3.2. Multi-Segment Mode 4.3.3. Interlaken Look-aside Mode
4.3.1. Interleaved and Packet Modes x
4.3.1.1. Transmit User Data Interface Examples 4.3.1.2. Receive User Data Interface Example
4.3.2. Multi-Segment Mode x
4.3.2.1. Multi-Segment Interface Example
4.3.3. Interlaken Look-aside Mode x
4.3.3.1. Transmit User Data Interface Example 4.3.3.2. Receive User Data Interface Examples
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. Reconfiguration Interface Signals 5.6. Interlaken Link and Miscellaneous Signals
1. About the F-Tile Interlaken Intel® FPGA IP Core
2. Getting Started
3. Parameter Settings
4. Functional Description
5. Interface Signals
6. IP Registers
7. F-Tile Interlaken Intel® FPGA IP User Guide Archives
8. Document Revision History for F-Tile Interlaken Intel® FPGA IP User Guide

4.2.1.1. Transmit Path Blocks

The Interlaken Look-aside mode transmit data path has the following three main functional blocks:
  • TX MAC
  • TX PCS
  • TX PMA
Figure 12. Interlaken Look-aside IP Core Transmit Path Blocks for NRZ VariationsThe figure illustrates the eight word data transfer scenario.
Figure 13. Interlaken Look-aside IP Core Transmit Path Blocks for PAM4 VariationsThe figure illustrates the eight word data transfer scenario.

TX MAC

The Interlaken Look-aside IP core TX MAC performs the following functions:
  • Populates burst and idle control words in the incoming data stream to align with the Interlaken Look-aside protocol.
  • Performs flow adaption of the data stream, repacking the data to ensure the maximum number of words is available on each valid clock cycle.
  • Calculates and inserts CRC24 bits in all burst and idle words.

TX PCS

Tthe FPGA soft logic implements TX PCS. The PAM4 variations contain a soft logic transcoder block to work with RS-FEC (544, 514) of the TX PMA. The Interlaken IP core TX PCS block performs the following functions for each lane:
  • Inserts the meta frame words in the incoming data stream.
  • Calculates and inserts the CRC32 bits in the meta frame diagnostic words.
  • Scrambles the data according to the scrambler seed and the protocol-specified polynomial.
  • Performs 64B/67B encoding.
  • Performs asynchronous operations and transmission lane alignment using TX Align FIFO.
  • Performs the Interlaken transcoding function to support the RS-FEC (544, 514) of the TX PMA in PAM4 mode applications.

TX PMA

The Interlaken IP core TX PMA serializes the data and sends it out on the Interlaken link. TX PMA contains three RS-FEC (544,514) blocks in 6x 53.125 Gbps PAM4 mode configuration. Each RS-FEC block serves four FEC channels in the aggregate mode.

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