F-Tile Interlaken Intel® FPGA IP User Guide

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ID 683622
Date 9/26/2022
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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. 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 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
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 Example Packet Mode Transfer 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. 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

4.3.3.2. Receive User Data Interface Example

The Interlaken Look-aside mode only supports packet mode data transfer. The following example illustrate how to use Interlaken Look-aside RX user data interface during a normal packet transfer:

Packet Mode Transfer Example

This example illustrates the expected behavior of the Interlaken Look-aside application interface receive signals during a packet transfer in packet mode.
Figure 25. Packet Transfer on Receive InterfaceThe following figure illustrates two packet transfer of 120 bytes and 49 bytes on the transmit interface with number of lanes is equal to eight and TX_CREDIT_LATENCY is equal to four.
From cycle 0 to cycle 4, there is no valid data drop by the IP as irx_valid deassert.

In cycle 5, the IP core asserts irx_valid, and all of irx_idle bits indicating that irx_dout_words carry idle control words.

In cycle 6, the IP deasserts irx_valid signal again indicating all of other signals are invalid.

In cycle 7, the IP core asserts irx_valid with irx_idle[7:0] is equal to 8'h0, which indicates irx_sop, irx_eopbits, and irx_dout_words carry valid data. The assertion of itx_sop[7] indicates the start of packet at the leftmost words. Corresponding irx_chan[7] indicates the channel associated with this data packet following this control word. With irx_eopbits is 0x0, irx_dout_words represents the actual data words of packet.

In cycle 8, the assertion of irx_eopbits[3] terminates the transfer of data, which happens on the rightmost words. All data words on irx_dout_words[511:0] are the last words of the packet. irx_eopbits[3:0]== 4'b1000 indicates all 8 bytes of the rightmost data word are valid.

In cycle 9, IP core deasserts irx_valid signal again indicating that all of the other signals are not valid.

In cycle 10, IP core flushes new packet with assertion of irx_sop[7] and irx_valid. The packet terminated in the same cycle as well with assertion of irx_eopbits[3]. The rx_eopbits[3:0]== 4’b1001 indicates only 1 byte of the rightmost words is valid. In this cycle, IP core outputs 49 bytes of data which is accessible from irx_dout_words[447:56].

In cycle 11, IP core deasserts irx_valid signal again indicating that all of other signals are not valid.

In cycle 12, IP core asserts irx_valid and all of irx_idle bits indicating that irx_dout_words carry idle control words.

This signal behavior correctly transfers first data packet as follows:
  • In cycle 7, the IP core outputs burst control word and 56 bytes of valid data (data 1).
  • In cycle 8, the IP core output 64 bytes of valid data (data 2).

The total packet length for the first packet is 56+64= 120 bytes.

This signal behavior correctly transfers second data packet as follows:
  • In cycle 10, the IP core outputs burst control word and 49 bytes of valid data (data 3).

The total packet length for the first packet is 49 bytes.

Level Two Title