Interrupt Type Codes

4.4.6Tx EOC Interrupt. Int_type = 101b

A Tx EOC interrupt occurs when ThunderLAN encounters a forward pointer of 0 in the Tx list structure or when the Ld_Thr bit is loaded with 0. In this routine the driver:

-Gets the pointer to the Tx buffer queue

-Checks the list CSTAT to see if a frame has been transmitted

J If no, acknowledges the interrupt and exits

J If yes, writes a 0 to CSTAT to make the list invalid

4.4.7Network Status Interrupt. Int_type = 110b and Int_Vec = 00h

A network status interrupt occurs when a PHY status change has been de- tected and ThunderLAN has seen an interrupt on the MDIO line. This interrupt type occurs only if a physical interface (PHY) with enhanced media indepen- dent interface (MII) support is used.

Some other causes of a status interrupt occur when the Tx and Rx channels are stopped using a STOP command. The following shows the flow for a status interrupt routine:

-Reads the NetSts register

-Clears the NetSts register. NetSts can be easily cleared by writing what has been read back into it.

-Reads the NetMask register

-Uses NetMask to ignore the NetSts bits, which are disabled

-Evaluates the following conditions:

J If the MIRQ bit is set, there was an MII interrupt from the PHY. For voice grade (VG) operation, this is an indication that the PHY needs to retrain.

J If the HBEAT bit is set, a heartbeat error was detected.

J If the TXSTOP bit is set, a Tx STOP command was given and the Tx channel is stopped.

J If the RXSTOP bit is set, an Rx STOP command was given and the Rx channel is stopped.

-Acknowledges interrupts and exits

Interrupt Handling

4-9

Page 75 Page 77
Page 76
Image 76
Texas Instruments TNETE110A Tx EOC Interrupt. Inttype = 101b, Network Status Interrupt. Inttype = 110b and IntVec = 00h
Page 75 Page 77

TNETE110A, TNETE211, TNETE100A specifications

Texas Instruments has been a leader in developing innovative semiconductor solutions, and their Ethernet PHY (Physical Layer Transceiver) family, specifically the TNETE100A, TNETE211, and TNETE110A, exemplifies this commitment to excellence. These devices are designed to address the needs of a variety of applications, ranging from industrial automation to consumer electronics.

The TNETE100A is a highly versatile Ethernet PHY capable of supporting 10/100 Mbps Ethernet connectivity. One of its main features is the low power consumption, which makes it an ideal choice for battery-operated devices. It incorporates advanced power management technologies, ensuring that the device operates efficiently while maintaining high performance. The TNETE100A also supports Auto-Negotiation, allowing for seamless communication between devices at different speeds, thereby enhancing flexibility in network configurations.

Moving to the TNETE211, this device supports 10/100/1000 Mbps Ethernet, making it suitable for high-speed networking applications. This PHY integrates features such as Energy Efficient Ethernet (EEE), which reduces power consumption during low-traffic periods, aligning with the contemporary demand for energy efficiency in networking equipment. The TNETE211 is engineered with robust EMI (Electromagnetic Interference) performance and provides multiple interface options, making it a versatile choice for embedded systems and networking applications.

The TNETE110A stands out in the lineup as a sophisticated device that supports both Fast Ethernet and Gigabit Ethernet. This PHY utilizes advanced signal processing techniques to ensure superior link robustness and performance in noisy environments. Its features include an integrated transformer driver, which simplifies PCB design and allows for compact device layouts. Additionally, the TNETE110A is designed to be fully compliant with Ethernet standards, ensuring reliable interoperability with other network components.

All three PHYs leverage Texas Instruments' expertise in integrated circuit design, resulting in low jitter and high signal integrity, essential for modern communication standards. They are optimized for a wide range of temperatures, making them suitable for harsh industrial applications. With built-in diagnostic capabilities, these devices also enable efficient fault detection and troubleshooting in network infrastructures.

In summary, the Texas Instruments TNETE100A, TNETE211, and TNETE110A are exemplary Ethernet PHY devices, each tailored to meet specific networking needs while adhering to stringent efficiency and performance criteria. Their advanced features, technologies, and reliability make them pivotal components in today's fast-paced digital landscape.
Top Page Image Contents