WJLXT972MLC.A4 S L7U9 Intel, WJLXT972MLC.A4 S L7U9 Datasheet - Page 31

• Manufacturer Part Number: WJLXT972MLC.A4 S L7U9
• Manufacturer: Intel

Specifications of WJLXT972MLC.A4 S L7U9

• Lead Free Status / RoHS Status: Compliant

5.4.1
5.4.2
5.4.2.1
5.4.3
Datasheet
Document Number: 302875-005
Revision Date: 27-Oct-2005
MDIO Control Mode and Hardware Control Mode
In the MDIO Control mode, the LXT972M Transceiver reads the Hardware Control Interface pins
to set the initial (default) values of the MDIO registers. Once the initial values are set, bit control
reverts to the MDIO interface.
The following modes are available using MDIO Control.
On power-up or hardware reset, the LXT972M Transceiver reads the Hardware Control Interface
pins and sets the MDIO registers accordingly.
The following modes are available using the Hardware Control:
When the network link is forced to a specific configuration, the LXT972M Transceiver
immediately begins operating the network interface as commanded. When auto-negotiation is
enabled, the LXT972MTransceiver begins the auto-negotiation/parallel-detection operation.
Reduced-Power Modes
This section discusses the LXT972M Transceiver reduced-power modes.
Software Power Down
Software power-down control is provided by Register bit 0.11 in the Control Register. (See
Table 41 on page 76.)
Reset for Intel
The LXT972M Transceiver provides both hardware and software resets, each of which manage
differently the configuration control of auto-negotiation, speed, and duplex-mode selection.
For a software reset, Register bit 0.15 = 1. For register bit definitions used for software reset, see
Table 41, “Control Register - Address 0, Hex 0” on page
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Force network link operation to:
Allow auto-negotiation/parallel-detection
Auto-negotiation-enabled advertising, either:
LXT972M Transceiver device ID enable
Link Hold-off
The network port is shut down.
The MDIO registers remain accessible.
— 100BASE-TX, Full-Duplex
— 100BASE-TX, Half-Duplex
— 10BASE-T, Full-Duplex
— 10BASE-T, Half-Duplex
— 10/100 BASE-T Full/Half Duplex
— 10/100 BASE-T Half Duplex
®
During soft power-down, the following conditions are true:
LXT972M Transceiver
Intel
®
LXT972M Single-Port 10/100 Mbps PHY Transceiver
76.
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