F-Tile Ethernet Intel® FPGA Hard IP User Guide

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ID 683023
Date 4/11/2025
Public
Document Table of Contents
Document Table of Contents x
1. Overview 2. Getting Started 3. F-Tile Ethernet Intel® FPGA Hard IP Parameters 4. Functional Description 5. Clocks 6. Resets 7. Interface Overview 8. Configuration Registers 9. Supported Modules and IPs 10. Supported Tools 11. F-Tile Ethernet Intel® FPGA Hard IP User Guide Archives 12. Document Revision History for the F-Tile Ethernet Intel® FPGA Hard IP User Guide
1. Overview x
1.1. Ethernet System in F-Tile Overview 1.2. F-Tile Ethernet Intel® FPGA Hard IP Overview
1.2. F-Tile Ethernet Intel® FPGA Hard IP Overview x
1.2.1. Device Family Support 1.2.2. Device Speed Grade Support 1.2.3. Resource Utilization 1.2.4. Round-trip Latency 1.2.5. Release Information
2. Getting Started x
2.1. Installing and Licensing F-Tile Ethernet Intel® FPGA Hard IP Cores 2.2. Specifying the IP Core Parameters and Options 2.3. Reference and System PLL Clock for your IP Design 2.4. Generated File Structure 2.5. Generating Tile Files 2.6. IP Core Testbenches
2.4. Generated File Structure x
2.4.1. Generating IP-XACT File
4. Functional Description x
4.1. Datapath Description 4.2. F-Tile Ethernet Intel® FPGA Hard IP MAC 4.3. PCS, OTN, and FlexE Modes 4.4. Precision Time Protocol 4.5. Auto-Negotiation and Link Training
4.2. F-Tile Ethernet Intel® FPGA Hard IP MAC x
4.2.1. MAC TX Datapath 4.2.2. MAC RX Datapath 4.2.3. Congestion and Flow Control Using PAUSE or Priority Flow Control (PFC) 4.2.4. Link Fault Signaling 4.2.5. Order of Ethernet Transmission
4.2.1. MAC TX Datapath x
4.2.1.1. TX Preamble, Start, and SFD Insertion 4.2.1.2. Source Address Insertion 4.2.1.3. Length/Type Field Processing 4.2.1.4. Frame Padding 4.2.1.5. Frame Check Sequence (CRC-32) Insertion 4.2.1.6. Inter-Packet Gap Generation and Insertion 4.2.1.7. TX Packing Logic
4.2.2. MAC RX Datapath x
4.2.2.1. RX Preamble Processing 4.2.2.2. RX Strict SFD Checking 4.2.2.3. RX FCS Checking 4.2.2.4. RX Malformed Packet Handling 4.2.2.5. Removing PAD Bytes and FCS Bytes from RX Frames 4.2.2.6. RX Undersized Frames, Oversized Frames, and Frames with Length Errors 4.2.2.7. Inter-Packet Gap
4.2.3. Congestion and Flow Control Using PAUSE or Priority Flow Control (PFC) x
4.2.3.1. Conditions Triggering XOFF Frame Transmission 4.2.3.2. Conditions Triggering XON Frame Transmission 4.2.3.3. Pause Control and Generation Interface 4.2.3.4. Pause Control Frame Filtering
4.3. PCS, OTN, and FlexE Modes x
4.3.1. PCS Mode 4.3.2. OTN Mode 4.3.3. FlexE Mode
4.4. Precision Time Protocol x
4.4.1. Features 4.4.2. PTP Timestamp Accuracy 4.4.3. PTP Client Flow 4.4.4. RX Virtual Lane Offset Calculation for No FEC Variants 4.4.5. Virtual Lane Order and Offset Values 4.4.6. UI Adjustment 4.4.7. Reference Time Interval 4.4.8. Minimum and Maximum Reference Time (TAM) Interval for UI Measurement (Hardware) 4.4.9. UI Value and PMA Delay 4.4.10. Routing Delay Adjustment for Advanced Timestamp Accuracy Mode 4.4.11. Routing Delay Adjustment for Basic Timestamp Accuracy Mode
4.4.3. PTP Client Flow x
4.4.3.1. PTP TX Client Flow 4.4.3.2. PTP RX Client Flow
4.4.6. UI Adjustment x
4.4.6.1. TX UI Adjustment 4.4.6.2. RX UI Adjustment
5. Clocks x
5.1. Clock Connections in Single Instance Operation 5.2. Clock Connections in Multiple Instance Operation 5.3. Clock Connections in MAC Asynchronous FIFO Operation 5.4. Clock Connections in PTP-Based Synchronous and Asynchronous Operation 5.5. Clock Connections in Synchronous Ethernet Operation 5.6. Custom Cadence
6. Resets x
6.1. Reset Signals 6.2. Reset Sequence
7. Interface Overview x
7.1. Status Interface 7.2. TX MAC Avalon ST Client Interface 7.3. RX MAC Avalon ST Aligned Client Interface 7.4. TX MAC Segmented Client Interface 7.5. RX MAC Segmented Client Interface 7.6. MAC Flow Control Interface 7.7. PCS Mode TX Interface 7.8. PCS Mode RX Interface 7.9. FlexE and OTN Mode TX Interface 7.10. FlexE and OTN Mode RX Interface 7.11. Custom Rate Interface 7.12. 32-bit Soft CWBIN Counters 7.13. Reconfiguration Interfaces 7.14. Precision Time Protocol Interface
7.2. TX MAC Avalon ST Client Interface x
7.2.1. TX MAC Avalon ST Client Interface with Disabled Preamble Passthrough 7.2.2. TX MAC Avalon ST Client Interface with Enabled Preamble Passthrough 7.2.3. Using MAC Avalon ST skip_crc Signal to Control Source Address, PAD, and CRC Insertion 7.2.4. Using MAC Avalon ST i_tx_error Signal to Mark Packets Invalid
7.3. RX MAC Avalon ST Aligned Client Interface x
7.3.1. RX MAC Avalon ST Client Interface with Disabled Preamble Passthrough 7.3.2. RX MAC Avalon ST Client Interface with Enabled Passthrough and RX CRC Forwarding 7.3.3. RX MAC Adapter Limitations 7.3.4. RX MAC Avalon ST Client Interface Status
7.4. TX MAC Segmented Client Interface x
7.4.1. TX MAC Segmented Client Interface with Disabled Preamble Passthrough 7.4.2. TX MAC Segmented Client Interface with Enabled Preamble Passthrough 7.4.3. Using MAC Segmented skip_crc Signal to Control Source Address, PAD, and CRC Insertion 7.4.4. Using MAC Segmented i_tx_mac_error to Mark Packets Invalid
7.5. RX MAC Segmented Client Interface x
7.5.1. RX MAC Segmented Client Interface with Disabled Preamble Passthrough 7.5.2. RX MAC Segmented Client Interface with Enabled Passthrough and RX CRC Forwarding 7.5.3. RX MAC Segmented Client Interface Status and Errors
7.13. Reconfiguration Interfaces x
7.13.1. Ethernet Reconfiguration Interfaces 7.13.2. Transceiver Reconfiguration Interfaces
7.14. Precision Time Protocol Interface x
7.14.1. Time-of-Day Interface 7.14.2. TX 2-Step Timestamp Interface 7.14.3. TX 1-Step Timestamp Interface 7.14.4. RX Timestamp Interface 7.14.5. PTP Status Interface 7.14.6. PTP Tile Interface
7.14.3. TX 1-Step Timestamp Interface x
7.14.3.1. PTP Field Offset for 1-Step Operation
8. Configuration Registers x
8.1. Ethernet Avalon® Memory-Mapped Interface Address Space 8.2. Transceiver Avalon® Memory-Mapped Interface Address Space
8.1. Ethernet Avalon® Memory-Mapped Interface Address Space x
8.1.1. Ethernet Hard IP Core CSRs 8.1.2. FEC and Transceiver Control and Status Registers
9. Supported Modules and IPs x
9.1. F-Tile Auto-Negotiation and Link Training For Ethernet Intel® FPGA IP 9.2. PTP Tile Adapter
9.1. F-Tile Auto-Negotiation and Link Training For Ethernet Intel® FPGA IP x
9.1.1. Overview 9.1.2. Release Information 9.1.3. Functional Description 9.1.4. Parameters 9.1.5. Clocks and Resets 9.1.6. Registers
9.2. PTP Tile Adapter x
9.2.1. Overview 9.2.2. Clocks, Reset, and Interface Ports 9.2.3. PTP Asymmetry Delay Reconfiguration Interface 9.2.4. PTP Peer-to-Peer MeanPathDelay Reconfiguration Interface
10. Supported Tools x
10.1. F-Tile Channel Placement Tool 10.2. Ethernet Toolkit Overview
10.2. Ethernet Toolkit Overview x
10.2.1. Features
1. Overview
2. Getting Started
3. F-Tile Ethernet Intel® FPGA Hard IP Parameters
4. Functional Description
5. Clocks
6. Resets
7. Interface Overview
8. Configuration Registers
9. Supported Modules and IPs
10. Supported Tools
11. F-Tile Ethernet Intel® FPGA Hard IP User Guide Archives
12. Document Revision History for the F-Tile Ethernet Intel® FPGA Hard IP User Guide

6.1. Reset Signals

The IP core has four soft reset inputs. These resets are asynchronous and are internally synchronized.
Table 33.  Reset SignalsAll specified resets are asynchronous.
Signal Description
Input Signals
i_rst_n

Active-low reset asynchronous signal. Do not deassert until the o_rst_ack_n deasserts.

  • Resets the TX interface, including the TX PCS and TX MAC.
  • Resets the RX interface, including the RX PCS and RX MAC.
  • Resets the TX PMA and TX EMIB.
  • Resets the RX PMA and RX EMIB.

This reset leads to assertion of the o_rst_ack_n output signal.

i_tx_rst_n

Active-low reset asynchronous signal. Resets the entire TX datapath, including the TX PCS, TX MAC, TX PMA, and TX EMIB. Do not deassert until the o_rst_ack_n asserts.

i_rx_rst_n

Active-low reset asynchronous signal. Resets the entire RX datapath, including the RX PCS, RX MAC, RX PMA, and RX EMIB. Do not deassert until the o_rst_ack_n asserts.

i_reconfig_reset

Active-high reconfiguration reset signal. Reset the entire reconfiguration clock domain, including the soft registers (CSRs).

You must assert this reset after power-on or during the configuration. The i_reconfig_clk must be stable before deasserting this reset.

Note:
When you enabled the AN/LT feature in the F-Tile Ethernet Intel® FPGA Hard IP, you must set the kr_pause AN/LT CSR register bit to 1 for a subsequent assertion of i_reconfig_reset after power-on and wait for kr_paused to be set to 1. Toggling i_reconfig_reset is now safe.
Output Signals
o_rst_ack_n

Active-low asynchronous acknowledgement signal for the i_rst_n reset.

Do not deassert i_rst_n reset until the o_rst_ack_n asserts.

o_tx_rst_ack_n

Active-low asynchronous acknowledgement signal for the i_tx_rst_n reset.

Do not deassert i_tx_rst_n reset until the o_tx_rst_ack_n asserts.

o_rx_rst_ack_n

Active-low asynchronous acknowledgement signal for the i_rx_rst_n reset.

Do not deassert i_rx_rst_n reset until the o_rx_rst_ack_n asserts.

Status Signals
o_tx_lanes_stable Active-high asynchronous status signal for the TX datapath.
  • Asserts when the TX datapath is ready to send data.
  • Deasserts when i_tx_rst_n/i_rst_n signal asserts or during the auto-negotiation and link training operation.
o_rx_pcs_ready Active-high asynchronous status signal for the RX datapath.
  • Asserts when the RX datapath is ready to receive data.
  • Deasserts when i_rx_rst_n/i_rst_n signal asserts or during the auto-negotiation and link training operation.

There are soft versions of the three datapath resets available as CSRs: soft_sys_rst, soft_tx_rst, and soft_rx_rst. These are similar to the i_rst_n, i_tx_rst_n, and i_rx_rst_n signals, respectively, but are active high. For these soft reset controls, you can either use the reset acknowledgment pins or query the reset status from the soft CSRs.

The datapath resets have acknowledgment signals (o_rst_ack_n, o_tx_rst_ack_n, and o_rx_rst_ack_n) indicating when the reset sequence is finished and the system is completely in reset. Note that the acknowledgment may come after some delay.

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