Resetting

3.2 Resetting

Resetting ThunderLAN is required when conditions such as an incorrect pow- er-up cause the register value in the device to deviate from that needed for proper operation. To perform either a software or hardware reset, the program- mer must complete the steps indicated.

3.2.1Hardware Reset

The IEEE 802.3 specification defines a power-up routine which must be fol- lowed to ensure that ThunderLAN's internal 10Base-T PHY powers up correct- ly. This routine also allows for the additional delay necessary when a crystal is used to drive the FXTL1 and FXTL2 lines.

1)Sync all attached PHYs

2)Isolate all attached PHYs by writing the PDOWN, LOOPBK, and ISOLATE bits into the control register (the GENen_ctl register in ThunderLAN)

3)Enable the internal PHY by writing 0x4000h (LOOPBK) in the GENen_ctl register

4)Wait 500 ms for the crystal frequency to stabilize

5)Reset the PHY state machine by asserting the LOOPBK and RESET bits in the GENen_ctl register

6)Resync the internal PHY

7)Read the control register until bit 15 (RESET) = 0 and the PHY comes out of reset. This is the time needed to read the register.

8)Load the selected PHY options into the GENen_ctl register

9)If using the attachment unit interface (AUI) mode, set the AUI bit in the TLPHY_ctl register

10)Wait one second for the clocks to start

3-8

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Texas Instruments TNETE100A, TNETE211, TNETE110A manual Resetting, Hardware Reset
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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.
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