PHY Generic Control Register±GENctl @ | Texas Instruments TNETE211

10Base-T PHY Registers

A.4.1 PHY Generic Control Register±GEN_ctl @ 0x0

Byte 1										Byte 0
15	14	13	12	11	10	9	8	7	6	5 4 3 2 1 0

RESET	LOOPBK	0	AUTO	PDOWN	ISOLATE	AUTO	DUPLEX	COL		Reserved
RESET	LOOPBK	0	ENB	PDOWN	ISOLATE	RSRT	DUPLEX	TEST		Reserved
			ENB			RSRT		TEST

Table A±19. PHY Generic Control Register Bits

Bit	Name	Function
15	RESET	PHY reset: Writing a 1 to this bit causes the PHY to be reset. This bit is self-clearing. The
		bit returns a value of 1 when read until the internal reset is complete.
14	LOOPBK	Loopback: This bit enables/disables internal loopback within the PHY device. When this
		bit is set to a 1 (default), data is internally wrapped within the PHY and does not appear
		on the network. When this bit is set to 0, data is transmitted to and received from the net-
		work. While the PHY is in the loopback state, all network lines are placed in a nonconten-
		tious state.
13	0	Speed selection bit: Not implemented
12
12	AUTOENB	Autonegotiation enable: This bit enables/disables the autonegotiation process. If this bit
		is clear, the link shall be configured via the DUPLEX bit and the PHY will implement the
		standard 10Base-T link integrity test. The default value of this bit is enabled.
		If this bit is set to one, the PHY engages in autonegotiation when a link-fail condition is
		detected. The link will not be valid until the AUTOCMPLT bit is set to one. The PHY does
		not automatically configure itself after autonegotiation has completed. Driver software
		must determine from the contents of the AN_adv, AN_lpa, and AN_exp registers what
		the correct setting for DUPLEX should be, or whether the link partner does not imple-
		ment 10Base-T.
11
11	PDOWN	Power-down: When this bit is set (default), the PHY is placed in a low-power consump-
		tion state. The time required for the PHY to power up after this bit is cleared can vary
		considerably, primarily based on whether a crystal or crystal oscillator is connected to

FXTL1/FXTL2 (around 50 ms for the former, and less than 2 ms for the latter). It is good practice to set the RESET bit after this time to ensure the PHY is in a valid state (this is not necessary when a crystal oscillator is used).

A-40

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 PHY Generic Control Register±GENctl @

Models: TNETE110A TNETE211 TNETE100A

A.4.1 PHY Generic Control Register±GEN_ctl @ 0x0

DUPLEX

Table A±19. PHY Generic Control Register Bits

Bit

RESET

AUTOENB

TNETE110A, TNETE211, TNETE100A specifications