Table A±5. HostCMD Register Bits | Texas Instruments TNETE211

Adapter Host Registers

Table A±5. Host_CMD Register Bits (Continued)

Bit Name Function

Stop

Channel stop: This command bit only affects the network channels.

if R/T = 0 (Tx Stop):

Writing a 1 to this bit stops frame transmission on all transmit channels immediately. All transmit FIFO control logic and the network transmission state machines are placed in a reset state as soon as any ongoing PCI bus transfers are complete (end of current data fragment, list, or CSTAT DMA).

-The TXSTOP2 bit in the NetSts register is set to indicate that the transmitter has been halted.

-If a STOP is requested during the completion of the DMA of a transmit frame, that frame's interrupts are posted as normal. If that frame was in the last list on the chan- nel, then an EOC interrupt is posted as normal.

if R/T = 1 (Rx Stop):

Writing a 1 to this bit stops frame reception on the receive channels immediately. All receive FIFO control logic and the network reception state machines are placed in a reset state as soon as any ongoing PCI bus transfers are complete (end of current data fragment, list, or CSTAT DMA).

-The RXSTOP3 bit in the NetSts register is set to indicate that the receiver has been halted. While the receiver is stopped, no network Rx statistics are gathered, as the Rx state machines are in reset.

-If a STOP is requested during the completion of the DMA of a transfer frame, that frame's interrupts are posted as normal. If that frame was in the last list on the chan- nel, then an EOC interrupt is posted as normal.

Writing a 0 to this bit has no effect. This bit is always read as 0.

2)The TXSTOP bit is not set if both transmit channels are already idle. The transmitter will, however, be reset. Because of this, the host must check for EOC or STOP interrupts, in case the transmitter EOCed just as the STOP command was issued. This window is not desirable, and should be fixed on PG2.0

3)The RXSTOP bit is not set if the receive channel is already idle. The receive is, however, reset. Because of this, the host must check for EOC or STOP interrupts, in case the receiver EOCed just as the STOP com- mand was issued. This is not desirable and should be fixed at PG 2.0

A-13

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.

Texas Instruments TNETE211, TNETE110A, TNETE100A manual Table A±5. HostCMD Register Bits

Models: TNETE110A TNETE211 TNETE100A

Table A±5. Host_CMD Register Bits (Continued)

Bit Name Function

TNETE110A, TNETE211, TNETE100A specifications