Intel® IXF1104 4-Port Gigabit Ethernet Media Access Controller

b.Set the port to be accessed by setting Register bits 17:16 to 0x3.

c.Select a Write access by setting Register bit 15 to 0x0.

d.Set the Device ID Register bits 14:11 to Ah (Atmel compatible).

e.Set the 11-bit register address (Register bits 10:0) to 0FFh. f. Enable the I2C controller by setting Register bit 2 to 0x1.

g.Initiate the I2C transfer by setting Register bit 24 to 0x1. All other bits in this register should be set to 0x0.

This data is written into the “I2C Control Ports 0 - 3 ($0x79B)" in a single cycle via the CPU interface.

2.When this register is written and the I2C Start bit is at a Logic 1, the I2C access state machine examines the Port Address Select and enables the I2C_DATA_0:3 output for the selected port.

3.The state machines uses the data in the Device ID and Register Address fields to build the data frame to be sent to the optical module

4.The I2C_DATA_WRITE_FSM internal state machine takes over the task of transferring the actual data between the IXF1104 MAC and the selected optical module (refer to the details in Section 5.7.3.4, “I²C Protocol Specifics” on page 112).

5.The I2C_DATA_WRITE_FSM internal state machine uses the data from the Write_Data field bits [23:16] of the “I2C Data Ports 0 - 3 ($0x79F)” on page 223 and sets the Write_Complete Register bit 22 of the “I2C Control Ports 0 - 3 ($0x79B)" to 0x1 to signify that the Write Access is complete.

6.The data is written through the CPU interface. The CPU must poll the Write_Complete bit until it is set to 0x1. It is safe to request a new access only when this bit is set.

Note: Only one optical module I2C access sequence can be run at any given time. The data for the first Write is lost if a second Write is carried out to the “I2C Control Ports 0 - 3 ($0x79B)" before a result is returned for the previous Write. Make sure Write complete = 0x1 before starting the next Write sequence to ensure that no data is lost.

5.7.3.4I²C Protocol Specifics

Section 5.7.3.4 describes the IXF1104 MAC I²C Protocol behavior, which is controlled by an internal state machine. Specific protocol states are defined below, with an additional description of the hardware signals used on the interface.

The Serial Clock Line (I2C_CLK) is an output from the IXF1104 MAC. The serial data is

synchronous with this clock and is driven off the rising edge by the IXF1104 MAC and off the falling edge by the optical module. The IXF1104 MAC has only one I2C_CLK line that drives all of the optical modules. I2C_CLK runs continuously when enabled (I²C Enable = 01h0).

The Serial Data (I2C_DATA_3:0) signals (one per port) are bi-directional for serial data transfer. These signals are open drain.

Datasheet

112

Document Number: 278757

Revision Number: 009

Revision Date: 27-Oct-2005

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Intel IXF1104 manual 3.4 I²C Protocol Specifics
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IXF1104 specifications

The Intel IXF1104 is a cutting-edge Network Interface Controller (NIC) designed to meet the needs of high-speed communication in modern networking environments. As the demand for bandwidth-intensive applications continues to grow, Intel's IXF1104 is engineered to deliver exceptional performance, reliability, and scalability, making it an ideal choice for data centers and enterprise networks.

One of the main features of the IXF1104 is its support for high-speed Ethernet connectivity, providing up to 100 Gbps throughput. This capability allows organizations to handle large amounts of data traffic efficiently, accommodating everything from cloud computing to big data analytics. The NIC utilizes advanced packet processing technology which ensures minimal latency, enhancing the overall user experience.

The IXF1104 is built on a robust architecture that integrates Intel's latest processing technologies. It incorporates a multi-core processing engine that allows for parallel processing of network packets, improving the handling of simultaneous network requests. This architecture also supports offloading features, freeing up CPU resources for other critical tasks, which optimizes system performance.

In terms of technologies, the IXF1104 supports a variety of standards including Ethernet and Fiber Channel, making it versatile across different networking environments. Its compatibility with industry-standard networking protocols ensures that it can easily integrate into existing frameworks, facilitating seamless upgrades and expansions.

Another significant characteristic of the IXF1104 is its energy efficiency. With Intel’s focus on sustainability, this NIC is designed to consume less power relative to its performance output, thereby reducing overall operational costs for organizations. It employs dynamic power management features that adjust power usage based on demand, which is especially beneficial in large-scale deployments.

Additionally, security features are woven into the IXF1104 design, protecting sensitive data from potential threats. Hardware-based security functions, including encryption capabilities and secure boot processes, ensure that the NIC can safeguard data integrity against unauthorized access.

Overall, the Intel IXF1104 stands out in the crowded NIC market by offering high-performance capabilities, energy efficiency, and robust security features. Its combination of advanced technologies and characteristics positions it as a strategic asset for modern networks, empowering organizations to achieve their connectivity and performance goals in an increasingly data-driven world.
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