F-Tile Triple-Speed Ethernet IP User Guide

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ID 741328
Date 8/04/2025
Public
Document Table of Contents
Document Table of Contents x
1. About the F-Tile Triple-Speed Ethernet IP User Guide 2. About F-Tile Triple-Speed Ethernet IP 3. Getting Started 4. Parameter Settings 5. Functional Description 6. Configuration Register Space 7. Interface Signals 8. Design Considerations 9. Timing Constraints 10. Software Programming Interface 11. F-Tile Triple-Speed Ethernet IP User Guide Archives 12. Document Revision History for the F-Tile Triple-Speed Ethernet IP User Guide A. Ethernet Frame Format B. Simulation Parameters
2. About F-Tile Triple-Speed Ethernet IP x
2.1. Release Information 2.2. Device Family Support 2.3. Features 2.4. 10/100/1000 Ethernet MAC Versus Small MAC 2.5. High-Level Block Diagrams 2.6. Example Applications 2.7. IP Verification 2.8. Performance and Resource Utilization
2.7. IP Verification x
2.7.1. Optical Platform 2.7.2. Copper Platform
3. Getting Started x
3.1. Introduction to Altera IP Cores 3.2. Installing and Licensing IPs 3.3. Specifying the IP Core Parameters and Options 3.4. IP Core Generation Output 3.5. Simulating IP Cores
3.2. Installing and Licensing IPs x
3.2.1. Altera FPGA IP Evaluation Mode
3.4. IP Core Generation Output x
3.4.1. Design Constraint File
4. Parameter Settings x
4.1. Core Configuration 4.2. Ethernet MAC Options 4.3. FIFO Options 4.4. Timestamp Options 4.5. PCS/Transceiver Options 4.6. LVDS Pin Settings
5. Functional Description x
5.1. 10/100/1000 Ethernet MAC 5.2. 1000BASE-X/SGMII PCS With Optional Embedded PMA 5.3. Precision Time Protocol 5.4. Deterministic Latency
5.1. 10/100/1000 Ethernet MAC x
5.1.1. MAC Architecture 5.1.2. MAC Interfaces 5.1.3. MAC Transmit Datapath 5.1.4. MAC Receive Datapath 5.1.5. MAC Transmit and Receive Latencies 5.1.6. FIFO Buffer Thresholds 5.1.7. Congestion and Flow Control 5.1.8. Magic Packets 5.1.9. MAC Local Loopback 5.1.10. MAC Reset 5.1.11. PHY Management (MDIO) 5.1.12. Connecting MAC to External PHYs
5.1.3. MAC Transmit Datapath x
5.1.3.1. IP Payload Re-alignment 5.1.3.2. Address Insertion 5.1.3.3. Frame Payload Padding 5.1.3.4. CRC-32 Generation 5.1.3.5. Interpacket Gap Insertion 5.1.3.6. Collision Detection in Half-Duplex Mode
5.1.4. MAC Receive Datapath x
5.1.4.1. Preamble Processing 5.1.4.2. Collision Detection in Half-Duplex Mode 5.1.4.3. Address Checking 5.1.4.4. Frame Type Validation 5.1.4.5. Payload Pad Removal 5.1.4.6. CRC Checking 5.1.4.7. Length Checking 5.1.4.8. Frame Writing 5.1.4.9. IP Payload Alignment
5.1.4.3. Address Checking x
5.1.4.3.1. Unicast Address Checking 5.1.4.3.2. Multicast Address Resolution
5.1.6. FIFO Buffer Thresholds x
5.1.6.1. Receive Thresholds 5.1.6.2. Transmit Thresholds 5.1.6.3. Transmit FIFO Buffer Underflow
5.1.7. Congestion and Flow Control x
5.1.7.1. Remote Device Congestion 5.1.7.2. Receive FIFO Buffer and Local Device Congestion
5.1.8. Magic Packets x
5.1.8.1. Sleep Mode 5.1.8.2. Magic Packet Detection
5.1.11. PHY Management (MDIO) x
5.1.11.1. MDIO Connection 5.1.11.2. MDIO Frame Format
5.1.12. Connecting MAC to External PHYs x
5.1.12.1. Gigabit Ethernet 5.1.12.2. Programmable 10/100 Ethernet 5.1.12.3. Programmable 10/100/1000 Ethernet Operation
5.2. 1000BASE-X/SGMII PCS With Optional Embedded PMA x
5.2.1. 1000BASE-X/SGMII PCS Architecture 5.2.2. Transmit Operation 5.2.3. Receive Operation 5.2.4. Transmit and Receive Latencies 5.2.5. GMII Converter 5.2.6. SGMII Converter 5.2.7. Auto-Negotiation 5.2.8. Ten-bit Interface 5.2.9. 1000BASE-X/SGMII PCS Reset
5.2.2. Transmit Operation x
5.2.2.1. Frame Encapsulation 5.2.2.2. 8b/10b Encoding
5.2.3. Receive Operation x
5.2.3.1. Comma Detection 5.2.3.2. 8b/10b Decoding 5.2.3.3. Frame De-encapsulation 5.2.3.4. Synchronization 5.2.3.5. Carrier Sense 5.2.3.6. Collision Detection
5.2.6. SGMII Converter x
5.2.6.1. Transmit 5.2.6.2. Receive
5.2.7. Auto-Negotiation x
5.2.7.1. 1000BASE-X Auto-Negotiation 5.2.7.2. SGMII Auto-Negotiation
5.3. Precision Time Protocol x
5.3.1. IEEE 1588v2 Supported Configurations 5.3.2. IEEE 1588v2 Features 5.3.3. IEEE 1588v2 Architecture 5.3.4. IEEE 1588v2 Transmit Datapath 5.3.5. IEEE 1588v2 Receive Datapath 5.3.6. IEEE 1588v2 Frame Format
5.3.6. IEEE 1588v2 Frame Format x
5.3.6.1. PTP Frame in IEEE 802.3 5.3.6.2. PTP Frame over UDP/IPv4 5.3.6.3. PTP Frame over UDP/IPv6
6. Configuration Register Space x
6.1. MAC Configuration Register Space 6.2. PCS Configuration Register Space 6.3. Register Initialization
6.1. MAC Configuration Register Space x
6.1.1. Base Configuration Registers (Dword Offset 0x00 – 0x17) 6.1.2. Statistics Counters (Dword Offset 0x18 – 0x38) 6.1.3. Transmit and Receive Command Registers (Dword Offset 0x3A – 0x3B) 6.1.4. Supplementary Address (Dword Offset 0xC0 – 0xC7) 6.1.5. IEEE 1588v2 Feature (Dword Offset 0xD0 – 0xD6) 6.1.6. Deterministic Latency (Dword Offset 0xE1– 0xE3) 6.1.7. IEEE 1588v2 Feature PMA Delay
6.1.1. Base Configuration Registers (Dword Offset 0x00 – 0x17) x
6.1.1.1. Command_Config Register (Dword Offset 0x02)
6.2. PCS Configuration Register Space x
6.2.1. Control Register (Word Offset 0x00) 6.2.2. Status Register (Word Offset 0x01) 6.2.3. Dev_Ability and Partner_Ability Registers (Word Offset 0x04 – 0x05) 6.2.4. An_Expansion Register (Word Offset 0x06) 6.2.5. If_Mode Register (Word Offset 0x14)
6.2.3. Dev_Ability and Partner_Ability Registers (Word Offset 0x04 – 0x05) x
6.2.3.1. 1000BASE-X 6.2.3.2. SGMII MAC Mode Auto Negotiation 6.2.3.3. SGMII PHY Mode Auto Negotiation
6.3. Register Initialization x
6.3.1. Triple-Speed Ethernet System with MII/GMII 6.3.2. Triple-Speed Ethernet System with SGMII 6.3.3. Triple-Speed Ethernet System with 1000BASE-X Interface
7. Interface Signals x
7.1. Interface Signals 7.2. Timing
7.1. Interface Signals x
7.1.1. 10/100/1000 Ethernet MAC Signals 7.1.2. 10/100/1000 Multiport Ethernet MAC Signals 7.1.3. 10/100/1000 Ethernet MAC with 1000BASE-X/SGMII PCS Signals 7.1.4. 10/100/1000 Ethernet MAC with 1000BASE-X/SGMII 2XTBI PCS and Embedded PMA Signals (F-Tile) 7.1.5. 10/100/1000 Ethernet MAC Without Internal FIFO Buffers with 1000BASE-X/SGMII 2XTBI PCS Signals 7.1.6. 10/100/1000 Ethernet MAC Without Internal FIFO Buffers with IEEE 1588v2 , 1000BASE-X/SGMII 2XTBI PCS, and Embedded Serial PMA Signals 7.1.7. 10/100/1000 Multiport Ethernet MAC with 1000BASE-X/SGMII PCS Signals 7.1.8. 10/100/1000 Ethernet MAC with 1000BASE-X/SGMII PCS and Embedded PMA Signals 7.1.9. 10/100/1000 Multiport Ethernet MAC with 1000BASE-X/SGMII PCS and Embedded PMA Signals 7.1.10. 1000BASE-X/SGMII PCS Signals 7.1.11. 1000BASE-X/SGMII 2XTBI PCS Signals 7.1.12. 1000BASE-X/SGMII PCS and PMA Signals
7.1.1. 10/100/1000 Ethernet MAC Signals x
7.1.1.1. Clock and Reset Signals 7.1.1.2. Clock Enabler Signals 7.1.1.3. MAC Control Interface Signals 7.1.1.4. MAC Status Signals 7.1.1.5. MAC Receive Interface Signals 7.1.1.6. MAC Transmit Interface Signals 7.1.1.7. Pause and Magic Packet Signals 7.1.1.8. MII/GMII/RGMII Signals 7.1.1.9. PHY Management Signals 7.1.1.10. ECC Status Signals
7.1.2. 10/100/1000 Multiport Ethernet MAC Signals x
7.1.2.1. Multiport MAC Clock and Reset Signals 7.1.2.2. Multiport MAC Receive Interface Signals 7.1.2.3. Multiport MAC Transmit Interface Signals 7.1.2.4. Multiport MAC Packet Classification Signals 7.1.2.5. Multiport MAC FIFO Status Signals
7.1.3. 10/100/1000 Ethernet MAC with 1000BASE-X/SGMII PCS Signals x
7.1.3.1. TBI Interface Signals 7.1.3.2. Status LED Control Signals 7.1.3.3. SERDES Control Signals 7.1.3.4. ECC Status Signals
7.1.4. 10/100/1000 Ethernet MAC with 1000BASE-X/SGMII 2XTBI PCS and Embedded PMA Signals (F-Tile) x
7.1.4.1. GMII Clock Signals 7.1.4.2. F-Tile Transceiver Direct PHY Signals
7.1.6. 10/100/1000 Ethernet MAC Without Internal FIFO Buffers with IEEE 1588v2 , 1000BASE-X/SGMII 2XTBI PCS, and Embedded Serial PMA Signals x
7.1.6.1. Deterministic Latency Clock Signals 7.1.6.2. IEEE 1588v2 RX Timestamp Signals 7.1.6.3. IEEE 1588v2 TX Timestamp Signals 7.1.6.4. IEEE 1588v2 TX Timestamp Request Signals 7.1.6.5. IEEE 1588v2 TX Insert Control Timestamp Signals 7.1.6.6. IEEE 1588v2 Time-of-Day (TOD) Clock Interface Signals 7.1.6.7. IEEE 1588v2 PCS Phase Measurement Clock Signal
7.1.8. 10/100/1000 Ethernet MAC with 1000BASE-X/SGMII PCS and Embedded PMA Signals x
7.1.8.1. 1.25 Gbps Serial Interface 7.1.8.2. Transceiver Native PHY Signal 7.1.8.3. Altera LVDS Transmitter and Receiver Soft-CDR I/O Signals
7.1.10. 1000BASE-X/SGMII PCS Signals x
7.1.10.1. PCS Control Interface Signals 7.1.10.2. PCS Reset Signals 7.1.10.3. MII/GMII Clocks and Clock Enablers 7.1.10.4. GMII 7.1.10.5. MII 7.1.10.6. SGMII Status Signals
7.1.11. 1000BASE-X/SGMII 2XTBI PCS Signals x
7.1.11.1. Clock Enablers 7.1.11.2. PCS Reset Signals 7.1.11.3. TBI Interface Signals
7.2. Timing x
7.2.1. Avalon Streaming Receive Interface 7.2.2. Avalon Streaming Transmit Interface 7.2.3. GMII Transmit 7.2.4. GMII Receive 7.2.5. RGMII Transmit 7.2.6. RGMII Receive 7.2.7. MII Transmit 7.2.8. MII Receive 7.2.9. IEEE 1588v2 Timestamp
8. Design Considerations x
8.1. Optimizing Clock Resources in Multiport MAC with PCS and Embedded PMA 8.2. Sharing PLLs in Devices with LVDS Soft-CDR I/O 8.3. Exposed Ports in the New User Interface 8.4. Clocking Scheme of MAC with 2XTBI PCS and Embedded PMA
8.1. Optimizing Clock Resources in Multiport MAC with PCS and Embedded PMA x
8.1.1. MAC and PCS With LVDS Soft-CDR I/O
9. Timing Constraints x
9.1. Creating Clock Constraints 9.2. Recommended Clock Frequency
10. Software Programming Interface x
10.1. Driver Architecture 10.2. Directory Structure 10.3. PHY Definition 10.4. Using Multiple SG-DMA Descriptors 10.5. Using Jumbo Frames 10.6. API Functions 10.7. Constants
10.6. API Functions x
10.6.1. alt_tse_mac_get_common_speed() 10.6.2. alt_tse_mac_set_common_speed() 10.6.3. alt_tse_phy_add_profile() 10.6.4. alt_tse_system_add_sys() 10.6.5. triple_speed_ethernet_init() 10.6.6. tse_mac_close() 10.6.7. tse_mac_raw_send() 10.6.8. tse_mac_setGMII mode() 10.6.9. tse_mac_setMIImode() 10.6.10. tse_mac_SwReset()
A. Ethernet Frame Format x
A.1. Basic Frame Format A.2. VLAN and Stacked VLAN Frame Format A.3. Pause Frame Format
A.3. Pause Frame Format x
A.3.1. Pause Frame Generation
B. Simulation Parameters x
B.1. Functionality Configuration Parameters B.2. Test Configuration Parameters
1. About the F-Tile Triple-Speed Ethernet IP User Guide
2. About F-Tile Triple-Speed Ethernet IP
3. Getting Started
4. Parameter Settings
5. Functional Description
6. Configuration Register Space
7. Interface Signals
8. Design Considerations
9. Timing Constraints
10. Software Programming Interface
11. F-Tile Triple-Speed Ethernet IP User Guide Archives
12. Document Revision History for the F-Tile Triple-Speed Ethernet IP User Guide
A. Ethernet Frame Format
B. Simulation Parameters

5.1.6.1. Receive Thresholds

Figure 20. Receive FIFO Thresholds


Table 22.  Receive Thresholds
Threshold Register Name Description
Almost empty rx_almost_empty The number of unread entries in the FIFO buffer before the buffer is empty. When the level of the FIFO buffer reaches this threshold, the MAC function asserts the ff_rx_a_empty signal. The MAC function stops reading from the FIFO buffer and subsequently stops transferring data to the user application to avoid buffer underflow.

When the MAC function detects an EOP, it transfers all data to the user application even if the number of unread entries is below this threshold.
Almost full rx_almost_full The number of unwritten entries in the FIFO buffer before the buffer is full. When the level of the FIFO buffer reaches this threshold, the MAC function asserts the ff_rx_a_full signal. If the user application is not ready to receive data (ff_rx_rdy = 0), the MAC function performs the following operations:
  • Stops writing data to the FIFO buffer.
  • Truncates received frames to avoid FIFO buffer overflow.
  • Asserts the rx_err[0] signal when the ff_rx_eop signal is asserted.
  • Marks the truncated frame invalid by setting the rx_err[3] signal to 1.

If the RX_ERR_DISC bit in the command_config register is set to 1 and the section-full (rx_section_full) threshold is set to 0, the MAC function discards frames with error received on the Avalon® streaming interface.
Section empty rx_section_empty An early indication that the FIFO buffer is getting full. When the level of the FIFO buffer hits this threshold, the MAC function generates an XOFF pause frame to indicate FIFO congestion to the remote Ethernet device. When the FIFO level goes below this threshold, the MAC function generates an XON pause frame to indicate its readiness to receive new frames. To avoid data loss, you can use this threshold as an early warning to the remote Ethernet device on the potential FIFO buffer congestion before the buffer level hits the almost-full threshold. The MAC function truncates receive frames when the buffer level hits the almost-full threshold.
Section full rx_section_full The section-full threshold indicates that there are sufficient entries in the FIFO buffer for the user application to start reading from it. The MAC function asserts the ff_rx_dsav signal when the buffer level hits this threshold.

Set this threshold to 0 to enable store and forward on the receive datapath. In the store and forward mode, the ff_rx_dsav signal remains deasserted. The MAC function asserts the ff_rx_dval signal as soon as a complete frame is written to the FIFO buffer.
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