F-Tile Interlaken Intel® FPGA IP User Guide

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ID 683622
Date 3/28/2022
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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 RX PMA RX PCS RX MAC RX Regroup Block 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
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

4.1.2.1. Receive Path Blocks

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

RX PMA

The Interlaken IP core RX PMA deserializes data that the IP core receives on the serial lines of the Interlaken link. The RX PMA contains RS FEC block in PAM4 mode of E-tile devices and 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.

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.
  • 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 mode IP variations.

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.
  • Calendar recovery, if Include in-band flow control functionality is turned on.

RX Regroup Block

The Interlaken IP core RX regroup block translates the IP core internal data format to the outgoing user application data irx_dout_words format.

For details on transceiver initialization, please refer to the F-Tile Architecture PHY IP User Guide.

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