Low Latency Ethernet 10G MAC Intel® FPGA IP User Guide

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ID 683426
Date 4/09/2024
Public
Document Table of Contents
Document Table of Contents x
1. About LL Ethernet 10G MAC 2. Getting Started 3. LL Ethernet 10G MAC Intel® FPGA IP Design Examples 4. Functional Description 5. Configuration Registers 6. Interface Signals 7. Low Latency Ethernet 10G MAC Intel® FPGA IP User Guide Archives 8. Document Revision History for the Low Latency Ethernet 10G MAC Intel® FPGA IP User Guide
1. About LL Ethernet 10G MAC x
1.1. Features 1.2. Release Information 1.3. Low Latency Ethernet 10G MAC Operating Modes 1.4. Device Family Support 1.5. Performance and Resource Utilization
1.1. Features x
1.1.1. LL Ethernet 10G MAC and Legacy 10-Gbps Ethernet MAC
1.5. Performance and Resource Utilization x
1.5.1. Resource Utilization 1.5.2. TX and RX Latency
2. Getting Started x
2.1. Introduction to Intel® FPGA IP Cores 2.2. Installing and Licensing Intel® FPGA IP Cores 2.3. Specifying the IP Core Parameters and Options ( Quartus® Prime Pro Edition) 2.4. IP Core Generation Output ( Quartus® Prime Pro Edition) 2.5. Files Generated for Intel IP Cores (Legacy Parameter Editor) 2.6. Simulating Intel® FPGA IP Cores 2.7. Creating a Signal Tap Debug File to Match Your Design Hierarchy 2.8. Parameter Settings for the Low Latency Ethernet 10G MAC Intel® FPGA IP Core 2.9. Upgrading the Low Latency Ethernet 10G MAC Intel® FPGA IP Core 2.10. Design Considerations for the Low Latency Ethernet 10G MAC Intel® FPGA IP Core
2.10. Design Considerations for the Low Latency Ethernet 10G MAC Intel® FPGA IP Core x
2.10.1. Migrating from Legacy Ethernet 10G MAC to LL Ethernet 10G MAC 2.10.2. Timing Constraints 2.10.3. Jitter on PLL Clocks
2.10.1. Migrating from Legacy Ethernet 10G MAC to LL Ethernet 10G MAC x
2.10.1.1. Migration—32-bit Datapath on Avalon® Streaming Interface 2.10.1.2. Migration—Maintains 64-bit on Avalon® Streaming Interface
2.10.2. Timing Constraints x
2.10.2.1. Pseudo-Static CSR Fields 2.10.2.2. Clock Crosser 2.10.2.3. Dual Clock FIFO
3. LL Ethernet 10G MAC Intel® FPGA IP Design Examples x
3.1. LL Ethernet 10G MAC Intel® FPGA IP Design Example for Stratix® 10 Devices 3.2. LL Ethernet 10G MAC Intel® FPGA IP Design Example for Arria® 10 Devices 3.3. LL Ethernet 10G MAC Intel® FPGA IP Design Example for Cyclone® 10 GX Devices
4. Functional Description x
4.1. Architecture 4.2. Interfaces 4.3. Frame Types 4.4. TX Datapath 4.5. RX Datapath 4.6. Flow Control 4.7. Reset Requirements 4.8. Supported PHYs 4.9. XGMII Error Handling (Link Fault) 4.10. IEEE 1588v2
4.4. TX Datapath x
4.4.1. Padding Bytes Insertion 4.4.2. Address Insertion 4.4.3. CRC-32 Insertion 4.4.4. XGMII Encapsulation 4.4.5. Inter-Packet Gap Generation and Insertion 4.4.6. XGMII Transmission 4.4.7. Unidirectional Feature 4.4.8. TX Timing Diagrams
4.5. RX Datapath x
4.5.1. XGMII Decapsulation 4.5.2. CRC Checking 4.5.3. Address Checking 4.5.4. Frame Type Checking 4.5.5. Length Checking 4.5.6. CRC and Padding Bytes Removal 4.5.7. Overflow Handling 4.5.8. RX Timing Diagrams
4.5.5. Length Checking x
4.5.5.1. Frame Length 4.5.5.2. Payload Length
4.6. Flow Control x
4.6.1. IEEE 802.3 Flow Control 4.6.2. Priority-Based Flow Control
4.6.1. IEEE 802.3 Flow Control x
4.6.1.1. Pause Frame Reception 4.6.1.2. Pause Frame Transmission
4.6.2. Priority-Based Flow Control x
4.6.2.1. PFC Frame Reception 4.6.2.2. PFC Frame Transmission
4.8. Supported PHYs x
4.8.1. 10GBASE-R Register Mode
4.10. IEEE 1588v2 x
4.10.1. Architecture 4.10.2. TX Datapath 4.10.3. RX Datapath 4.10.4. Frame Format
4.10.4. Frame Format x
4.10.4.1. PTP Packet in IEEE 802.3 4.10.4.2. PTP Packet over UDP/IPv4 4.10.4.3. PTP Packet over UDP/IPv6
5. Configuration Registers x
5.1. Register Map 5.2. Register Access Definition 5.3. Primary MAC Address 5.4. MAC Reset Control Register 5.5. TX Configuration and Status Registers 5.6. Flow Control Registers 5.7. Unidirectional Control Registers 5.8. RX Configuration and Status Registers 5.9. Timestamp Registers 5.10. ECC Registers 5.11. Statistics Registers
5.1. Register Map x
5.1.1. Mapping 10-Gbps Ethernet MAC Registers to LL Ethernet 10G MAC Registers
5.9. Timestamp Registers x
5.9.1. Calculating Timing Adjustments
6. Interface Signals x
6.1. Clock and Reset Signals 6.2. Speed Selection Signal 6.3. Error Correction Signals 6.4. Unidirectional Signals 6.5. Avalon® Memory-Mapped Interface Programming Signals 6.6. Avalon® Streaming Data Interfaces 6.7. Avalon® Streaming Flow Control Signals 6.8. Avalon® Streaming Status Interface 6.9. PHY-side Interfaces 6.10. IEEE 1588v2 Interfaces
6.6. Avalon® Streaming Data Interfaces x
6.6.1. Avalon® Streaming TX Data Interface Signals 6.6.2. Avalon® Streaming RX Data Interface Signals 6.6.3. Avalon® Streaming Data Interface Clocks
6.8. Avalon® Streaming Status Interface x
6.8.1. Avalon® Streaming Interface TX Status Signals 6.8.2. Avalon® Streaming Interface RX Status Signals
6.9. PHY-side Interfaces x
6.9.1. XGMII TX Signals 6.9.2. XGMII RX Signals 6.9.3. GMII TX Signals 6.9.4. GMII RX Signals 6.9.5. MII TX Signals 6.9.6. MII RX Signals
6.10. IEEE 1588v2 Interfaces x
6.10.1. IEEE 1588v2 Egress TX Signals 6.10.2. IEEE 1588v2 Ingress RX Signals 6.10.3. IEEE 1588v2 Interface Clocks
1. About LL Ethernet 10G MAC
2. Getting Started
3. LL Ethernet 10G MAC Intel® FPGA IP Design Examples
4. Functional Description
5. Configuration Registers
6. Interface Signals
7. Low Latency Ethernet 10G MAC Intel® FPGA IP User Guide Archives
8. Document Revision History for the Low Latency Ethernet 10G MAC Intel® FPGA IP User Guide

8. Document Revision History for the Low Latency Ethernet 10G MAC Intel® FPGA IP User Guide

Document Version Quartus® Prime Version IP Version Changes
2024.04.09 23.3 22.0.3
  • Updated the Stratix® 10 device family support to Final in Table: Device Family Support for LL 10GbE MAC.
  • Updated PTP Packet Format over IEEE 802.3 diagram to remove 9600 bytes from the payload field and added a footnote to clarify the maximum payload data size.
2023.12.26 23.3 22.0.3 Updated IP version to v22.0.3. Text edits only; no new technical information.
2023.11.17 18.1 18.1 Updated the following topics to mention additional support for 10G, 1G/10G, and 1G/2.5G/10G core variants:
  • Parameter Settings for the LL Ethernet 10G MAC Intel FPGA IP Core
  • Unidirectional Feature
  • Unidirectional Signals
2023.07.12 18.1 18.1 Updated the description for tx_period_10G, rx_period_10G, tx_period_mult_speed, and rx_period_mult_speed registers.
2022.03.01 18.1 18.1 Corrected TX and RX datapath Reset/Default to Enable parameter description in Table: LL Ethernet 10G MAC Intel FPGA IP Core Parameters.
2021.08.23 18.1 18.1 Corrected the insert correction of the P2P transparent clock for Delay_Req in Table: Timestamp and Correction Insertion for 1-Step Clock Synchronization.
2020.12.14 18.1 18.1
  • Updated Figure: Interface Signals.
  • Updated the directions for the following signals in Table: MII RX Signals:
    • mii_rx_d[]
    • mii_rx_dv
    • mii_rx_err
2020.06.24 18.1 18.1
  • Updated the Release Information topic.
  • Updated the Frame Type Checking topic.
2020.03.17 18.1 18.1
  • Updated the XGMII Error Handling (Link Fault) topic.
2019.12.13 18.1 18.1
  • Updated Table: Device Family Support for LL 10GbE MAC to correct minimum speed grade without 1588 feature for Stratix® 10 devices from -I3, -C3 to -I3, -E3.
  • Updated the description for avalon_st_tx_pfc_status_data[] in Table: Avalon® Streaming Interface TX Status Signals.
  • Updated the description for avalon_st_rx_pfc_status_data[] in Table: Avalon® Streaming Interface RX Status Signals.
  • Updated references to Avalon® -MM interface to Avalon® Memory-Mapped interface.
  • Updated references to Avalon® -ST interface to Avalon® Streaming interface.
2019.07.16 18.1 18.1
  • Updated Table: Clock Signals for the IEEE 1588V2 Interfaces to show tx_time_of_day_*_10G_* signal uses tx_312_5_clk and rx_time_of_day_*_10G_* signal uses rx_312_5_clk with or without Use legacy Ethernet 10G MAC Avalon Streaming interface option enabled.
2019.01.09 18.1 18.1
  • Updated Table: MAC Behavior for Different Frame Types to correct normal package size range from 65-1518 to 64-1518.
2018.10.03 18.1 18.1
  • Added support for the 10M/100M/1G/2.5G/5G/10G (USXGMII) variant for Intel Cyclone 10 GX devices:
  • Updated the Resource Utilization section.
  • Updated Tables:
    • Updated Table: Device Family Support for LL 10GbE MAC and PHY Configurations.
    • Updated Table: Features Comparison.
    • Updated Table: Resource Utilization for LL Ethernet 10G MAC for Intel Arria 10 and Intel Cyclone 10 GX Devices.
    • Updated Table: LL Ethernet 10G MAC Intel® FPGA IP Core Parameters to update the description for parameter Enable ECC on memory blocks.
  • Updated Table: LL Ethernet 10G MAC Intel FPGA IP Core Parameters:
    • Updated the descriptions for Enable time stamping, Enable PTP one-step clock support, Enable asymmetry support, Enable peer-to-peer, Timestamp fingerprint width, and Time of Day Format.
    • Updated the note for Enable peer-to-peer to state that this option is only available from Intel Quartus Prime Pro Edition version 17.0 onwards.
  • Updated the Priority-Based Flow Control topic.
  • Made minor editorial updates to the document.
2018.06.06 18.0 18.0
  • Updated Figure: PHY Configuration with 10GBASE-R with IEEE 1588v2 Enabled for Intel Stratix 10 Devices to correct the PCS-PMA interface width from 40 to 32 and the parallel clock frequency from 257.8125 MHz to 322.265625 MHz.
  • Added a note to the description of TX and RX datapath Reset/Default to Enable to clarify that this option is only available in Intel Quartus Prime Pro Edition version 18.0.
2018.05.10 18.0 18.0
  • Renamed the document as Low Latency Ethernet 10G MAC Intel FPGA IP User Guide.
  • Renamed "Low Latency Ethernet 10G MAC" IP core to "Low Latency Ethernet 10G MAC Intel FPGA IP" as per Intel rebranding.
  • Added support for 10M/100M/1G/2.5G/5G/10G (USXGMII) variant.
  • Added IEEE 1588v2 support for 10M/100M/1G/2.5G/5G/10G (USXGMII) variant for Intel Stratix 10 devices.
  • Added a new IP core parameter—TX and RX datapath Reset/Default to Enable.
  • Added a new Section: LL Ethernet 10G MAC Intel FPGA IP Design Examples.
  • Added new Topics:
    • LL Ethernet 10G MAC Operating Modes
    • IP Core Generation Output (Intel Quartus Prime Pro Edition)
    • Files Generated for Intel IP Cores (Legacy Parameter Editor).
  • Added new Figures:
    • PTP Packet in IEEE 802.3 Ethernet Frame
    • PTP packet within UDP over IPv4 over Ethernet Frame
    • PTP packet within UDP over IPv6 over Ethernet Frame
  • Updated the Features topic.
  • Updated Tables:
    • Resource Utilization for LL Ethernet 10G MAC for Intel Stratix 10 Devices
    • Resource Utilization for LL Ethernet 10G MAC for Intel Arria 10 and Intel Cyclone 10 Devices
    • TX and RX Latency Values for Intel Stratix 10 Devices
    • TX and RX Latency Values for Intel Arria 10 and Intel Cyclone 10 Devices
    • Device Family Support for LL 10GbE MAC and PHY Configurations
    • LL Ethernet 10G MAC Intel® FPGA IP Core Parameters
    • Avalon® -ST TX Data Interface Signals
    • Timestamp Registers
    • Hardware PMA Delay
    • IEEE 1588v2 Egress TX Signals
    • IEEE 1588v2 Igress RX Signals
  • Added a note to the Timing Constraints topic.
  • Removed Generated Files topic.
  • Updated Figure: Interface Signals.
  • Added a note to the Reset Requirements topic to clarify that the value of the avalon_st_tx_ready signal can be 0 or 1 during reset.
  • Updated the description of theEnable 10GBASE-R register mode parameter in the Parameter Settings for the LL Ethernet 10G MAC Intel® FPGA IP Core topic.
  • Updated descriptions for the PTP Packet in IEEE 802.3, PTP Packet over UDP/IPv4, and PTP Packet over UDP/IPv6 topics.
  • Updated the IEEE 1588v2 topic:
    • Added PHY operating speed random error support for 5Gbps.
    • Added a note on static error.
  • Updated for latest Intel branding standards.
  • Made editorial updates throughout the document.
Date Version Changes
March 2018 2018.03.07
  • Corrected the Intel Cyclone 10 GX device speed grades:
    • With 1588 feature: Corrected speed grade values from -I2, -E2 to -I5, -E5.
    • Without 1588 feature: Corrected speed grade values from -I3, -E3 to -I6, -E6.
  • Updated Figure: PHY Configuration with 10GBASE-R with IEEE 1588v2 Enabled for Intel Stratix 10 Devices
December 2017 2017.12.25
  • Updated the decription in the 10GBASE-R Register Mode topic:
    • Added support for Intel Stratix 10 devices.
    • Added Figure: PHY Configuration with 10GBASE-R with IEEE 1588v2 Enabled for Intel Stratix 10 Devices.
November 2017 2017.11.06
  • Renamed the document as Intel FPGA Low Latency Ethernet 10G MAC User Guide.
  • Added support for the Intel Cyclone 10 GX device family.
  • Added a new feature—Peer-to-Peer:
    • Added a new parameter—Enable peer-to-peer support.
    • Updated the description in the TX Datapath sub-topic of the IEEE 1588v2 topic.
    • Added new timestamp registers:
      • Added new IEEE 1588v2 Egress TX signals—tx_egress_p2p_update and tx_egress_p2p_val[].
      • Added new IEEE 1588v2 Ingress RX signals—rx_ingress_p2p_val[] and rx_ingress_p2p_val_valid.
  • Updated the About LL Ethernet 10G MAC section:
    • Updated the Features topic.
    • Updated the "Device Family Support for LL 10GbE MAC" table: Updated the support for Intel Arria 10 and Intel Cyclone 10 GX device families from Preliminary to Final.
    • Updated the "Device Family Support for Configurations" table: Updated the configuration support for Intel Stratix 10 and Intel Cyclone 10 GX device families.
  • Updated the Getting Started section:
    • Updated Creating a Signal Tap Debug File to Match Your Design Hierarchy topic.
    • Updated the Parameter Settings for the LL Ethernet 10G MAC IP Core topic:
      • Updated the descriptions of the Enable ECC on memory blocks, Enable time stamping, , Enable asymmetry support, Timestamp fingerprint width, and Time of Day Format parameters.
    • Added Jitter on PLL Clocks topic.
  • Updated the Functional Description section:
    • Updated the Payload Length topic.
    • Updated the 10GBASE-R Register Mode topic: Added a note to clarify that 10GBASE-R register mode is not supported in Intel Stratix 10 devices.
  • Updated the Configuration Registers section:
    • Updated the "Timestamp Registers" table: Updated the descriptions for the tx_fns_adjustment_10G, tx_ns_adjustment_10G, rx_fns_adjustment_10G, rx_ns_adjustment_10G, tx_fns_adjustment_mult_speed, tx_ns_adjustment_mult_speed, rx_fns_adjustment_mult_speed, and rx_ns_adjustment_mult_speed registers.
    • Updated "Hardware PMA Delay" table: Updated the RX latency values for Intel Stratix 10 devices.
  • Updated for latest branding standards.
  • Made editorial updates throughout the document.
June 2017 2017.06.19
  • Added support for two new variants:
    • 10M/100M/1G/2.5G
    • 10M/100M/1G/2.5G/10G
  • Updated the following tables:
    • Features Comparison
    • Device Family Support for Configurations
  • Updated the Interface Signals figure.
  • Device Family Support forUpdated the operating modes for the clock and reset signals in the Clock and Reset Signals table.
  • Updated descriptions and tables for the following topics:
    • Parameter Settings for the LL Ethernet 10G MAC IP Core
    • Unidirectional Signals
    • XGMII TX Signals
    • XGMII RX Signals
    • GMII TX Signals
    • GMII RX Signals
    • MII TX Signals
    • MII RX Signals
    • IEEE 1588v2 Ingress TX Signals
    • IEEE 1588v2 Ingress RX Signals
  • Added unidirectional_force_remote_fault signal in the Unidirectional Signals table.
  • Made minor editorial updates.
May 2017 2017.05.08
  • Clarified the device family support for Stratix 10 devices.
  • Updated the Features topic.
  • Updated the Device Family Support topic:
    • Added Intel FPGA IP Core Device Support Levels table.
    • Updated the LL Ethernet 10G MAC table to include Stratix 10 speed grades with 1588 feature.
  • Removed the Definition: Device Support Level topic.
  • Updated the Device Family Support for Configurations table to include additional configurations that support Stratix 10 device family:
    • 1G/2.5G/10G MAC with 1G/2.5G/10G Multi-rate Ethernet PHY
    • 1G/2.5G/10G MAC with 1G/2.5G/10G Multi-rate Ethernet PHY and IEEE 1588v2
    • 1G/2.5G MAC with 1G/2.5G Multi-rate Ethernet PHY
    • 1G/2.5G MAC with 2.5G Multi-rate Ethernet PHY
    • 10M/100M/1G/10G MAC with IEEE 1588v2
    • 1G/10G MAC with Backplane Ethernet 10GBASE-KR PHY
  • Added tables listing resource utilization for Arria 10 and Stratix 10 devices in the Resource Utilization topic.
  • Updated the Hardware PMA Delay table to include support for Stratix 10 device family.
  • Updated the TX Configuration and Status Registers table:
    • Revised the HW Reset Value of tx_ipg_10g from 0x0 to 0x1.
    • Revised the HW Reset Value of tx_ipg_10M_100M_1G from 0x0 to 0x0C.
  • Added tables listing LX and RX latency values for Arria 10 and Stratix 10 devices in the TX and RX latency topic.
  • Updated the Timestamp Registers table to map registers in order of address.
  • Updated the Clock and Reset Signals table.
  • Updated the description for speed_sel signal in the Speed Selection table.
  • Updated the width and description for csr_address[] in the Avalon-MM Programming Signals table.
  • Updated the width and description for avalon_st_tx_data[] signal in both Avalon-ST TX Data Interface Signals and Avalon-ST RX Data Interface Signals tables.
  • Updated Typical Client Frame at TX Interface figure, Endian Conversion figure, and Typical Client Frame at Receive Interface figure.
October 2016 2016.10.31
  • Added support for the Stratix 10 device family.
  • Added 1588 asymmetry support feature.
  • Corrected the Arria 10 device speed grades from –C2 and –C3 to –E2 and –E3.
  • Updated the topic about XGMII encapsulation in the TX datapath to clarify that the MAC TX converts the eighth byte of the preamble to a 1-byte SFD.
  • Added a table listing the MAC behavior for different frame types in the topic about frame type checking.
  • Updated the topic listing the clock and reset signals to specify the clock domains of the tx_rst_n and rx_rst_n signals.
  • Updated the avalon_st_txstatus_data[] signal description to clarify that the status is only valid if the TX frame is valid.
  • Updated the description of avalon_st_txstatus_error[5] to clarify that this bit asserts if the avalon_st_tx_error input signal from client is asserted.
  • Added tables listing the clocks for the Avalon® -ST and IEEE 1588v2 interface signals.
  • Added the different word offsets for the tx_ipg_10g, tx_ipg_10M_100M_1G, ecc_status, ecc_enable, and mac_reset_control registers if you turn on Use legacy Ethernet 10G MAC Avalon Memory-Mapped interface.
  • Updated document template.
May 2016 2016.05.02
  • Updated the following topics to include the new speed mode 1G/2.5G/5G/10G (USXGMII): Features, Device Family Support, Parameter Settings, XGMII TX, and XGMII RX.
  • Added a new topic: LL Ethernet 10G MAC and Legacy 10-Gbps Ethernet MAC.
  • Added a new topic: Creating a SignalTap II Debug File to Match Your Design Hierarchy.
  • Updated the description of the Overflow Handling.
  • Replace the timing diagram in the XGMII Error Handling topic.
  • Revised the description of invalid frames in the Statistics Registers topic and removed the tx_stats_etherStatsCRCErr, tx_stats_etherStatsJabbers, tx_stats_etherStatsFragments, and tx_stats_framesCRCErr from the topic.
  • Removed the PMA Delay from Simulation Model table from the Calculating Timing Adjustment topic because simulation data is not deterministic.
November 2015 2015.11.02
  • Updated the Features, Device Family Support, Configuration Registers, and Interface Signals topics for 1G/2.5G and 1G/2.5G/10G operating speeds.
  • Updated the Resource Utilization table.
  • Revised the description in the Upgrading Outdate IP Cores topic.
  • Updated the Reset topic, added a step in stage 2.
  • Updated the Register Access topic, ECC status, and statistics clear register definitions.
  • Updated the tx_unidir_control register to include support for user-triggered remote fault notification.
  • Removed the Migrating IP Cores to a Different Device topic.
May 2015 2015.05.04
  • Update the Device Support table.
  • Updated the Resource Utilization table.
  • Updated the Parameter Settings table.
  • Added instruction on how to read statistics counters in the Statistics Registers topic.
  • Added new registers: tx_vlan_detection, rx_vlan_detection, tx_ipg_10g, tx_ipg_10M_100M_1G, tx_transfer_status, and rx_transfer_status.
  • Updated the description of the rx_stats_octetsOK and tx_stats_octetsOK statistics counters.
  • Update the Length Checking topic.
  • Added the Reset Requirements topic.
  • Added the Deriving TX Timing Adjustments and Deriving RX Timing Adjustments topics.
  • Removed the Minimum Inter-packet Gap topic.
December 2014 2014.12.15
  • Updated the Performance and Resource Utilization table—improved the resource utilization for IEEE 1588v2 feature.
  • Added a new feature—10GBASE-R register mode:
    • Added a new parameter—Enable 10GBASE-R register mode.
    • Added new signals—tx_xcvr_clk, rx_xcvr_clk, xgmii_tx_valid, xgmii_rx_valid.
  • Added new parameter options for Time of Day Format.
  • Added a new table in the Frame Type Checking topic to describe the MAC behavior for different frame types.
  • Added a new table—Register Access Type Convention—to describe the access type for the IP core registers.
  • Added a new section about timing constraints.
  • Revised the receive timestamp registers word offset to start from 0x0120 to 0x012C.
  • Added a recommendation for the csr_rst_n signal—deassert the csr_rst_n signal at least once after tx_clk and rx_clk are stable.
  • Revised the number of bits for fractional number of clock cycle for rx_path_delay_10g_data and rx_path_delay_1g_data signals to Bit [9:0]: Fractional number of clock cycle, Bit [21/15:10]:Number of clock cycle.
  • Updated the signals description for:
    • tx_egress_timestamp_request_fingerprint[]
    • tx_egress_timestamp_96b_data[]
    • tx_egress_timestamp_64b_data[]
    • tx_time_of_day_96b_1g_data
    • tx_time_of_day_64b_1g_data
June 2014 2014.06.30
  • Improved the performance and resource utilization.
  • Added a new feature—Unidirectional Ethernet.
    • Added a new parameter—Enable Unidirectional feature.
    • Added Unidirectional registers and signals.
  • Added information about PMA analog and digital delay for IEEE 1588v2 MAC registers.
  • Edited the bit description of avalon_st_rxstatus_error[] signal.
  • Added more information about the avalon_st_pause_data[0] bit signal to indicate that the transmission of XON pause frames only trigger for one time after XOFF pause frames regardless of how long the avalon_st_pause_data[0] is asserted.
  • Updated the statistics registers description.
  • Edited the bit description of tx_underflow_counter0, tx_underflow_counter1, rx_pktovrflow_etherStatsDropEvents,rx_pktovrflow_error signals.
  • Edited the bit description of csr_clk signal to state that the recommended clock frequency for this signal is 125 Mhz–156.25 Mhz regardless of whether you select register-based or memory-based statistics counter.
  • Updated the tx_rst_n and rx_rst_n signals description to reflect the change from asynchronous reset to synchronous reset.
  • Updated the csr_waitrequest signal description.
December 2013 2013.12.02 Initial release
Level Two Title