F-Tile Interlaken Intel® FPGA IP User Guide

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ID 683622
Date 7/08/2024
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Document Table of Contents
Document Table of Contents x
1. About the F-Tile Interlaken Intel® FPGA IP 2. Getting Started 3. Parameter Settings 4. Functional Description 5. Interface Signals 6. F-Tile Interlaken 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 x
1.1. F-Tile Interlaken IP Features 1.2. F-Tile Interlaken IP Device Family Support 1.3. Device Speed Grade Support 1.4. F-Tile Interlaken IP Performance and Resources 1.5. F-Tile Interlaken IP Round-trip Latency 1.6. F-Tile Interlaken IP Release Information
2. Getting Started x
2.1. Installing and Licensing Intel® FPGA IPs 2.2. Generated File Structure 2.3. Specifying the F-Tile Interlaken IP Parameters and Options 2.4. Reference and System PLL Clock for your IP Design 2.5. Simulating the F-Tile Interlaken IP 2.6. Compiling the Full Design and Programming the FPGA
2.1. Installing and Licensing Intel® FPGA IPs 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
3. Parameter Settings x
3.1. Analog Parameters
4. Functional Description x
4.1. Datapath Flow 4.2. Interlaken Look-aside Datapath 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 4.8. 32-bit Soft CWBIN Counters
4.1. Datapath 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 Datapath 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
4.2.2. Interlaken Look-aside RX Path x
4.2.2.1. Look-aside Receive Path Blocks RX Regroup RX MAC RX PCS 4.2.2.2. RX Error Handling
4.3. Modes of Operation x
4.3.1. Interleaved and Packet Modes 4.3.2. Multisegments 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. Multisegments 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 Example
5. Interface Signals x
5.1. F-Tile Interlaken IP Clock and Reset Interface Signals 5.2. F-Tile Interlaken IP Transmit User Interface Signals 5.3. F-Tile Interlaken IP Receive User Interface Signals 5.4. F-Tile Interlaken IP Management Interface Signals 5.5. F-Tile Interlaken IP Reconfiguration Interface Signals 5.6. F-Tile Interlaken Link and Miscellaneous Signals
1. About the F-Tile Interlaken Intel® FPGA IP
2. Getting Started
3. Parameter Settings
4. Functional Description
5. Interface Signals
6. F-Tile Interlaken 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

4.2.2.1. Look-aside Receive Path Blocks

The Interlaken Look-aside mode receive data path has the following four main functional blocks:
  • RX Regroup
  • RX MAC
  • RX PCS
  • RX PMA
Figure 16. Interlaken Look-aside IP Receive Path Blocks for NRZ VariationsThe figure illustrates the eight word data transfer scenario. This figure uses the following conventions:
  • m= Number of lanes
Figure 17. Interlaken Look-aside IP Receive Path Blocks for PAM4 VariationsThe figure shows the eight word data transfer scenario. This figure uses the following conventions:
  • m= Number of lanes

RX Regroup

The Interlaken IP with look-aside IP RX regroup block translates the IP internal data format to the outgoing user application data

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 RX MAC performs the following functions:
  • Data de-striping, including lane alignment and burst assembly from the PCS lanes.
  • CRC24 validation.

RX PCS

The FPGA soft logic implements RX PCS in F-Tile devices. In PAM4 mode, the F-Tile device variations contain a soft logic transcoder block to work with RS-FEC of the RX PMA. The Interlaken IP 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.
  • Performs asynchronous operations and receiver alignment using RX Align FIFO.
  • Performs the Interlaken inverse transcoding function on the data received from the RX RS-FEC (544, 514) in PAM4 variations.

For more information about error conditions, refer to the ILKN_FEC_XCODER_TX_ILLEGAL_STATE (offset 0x80) and ILKN_FEC_XCODER_RX_UNCOR_FECCW (offset 0x81) registers.

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 RX MAC performs the following functions:
  • Data de-striping, including lane alignment and burst assembly from the PCS lanes.
  • CRC24 validation
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