DM9010BI datasheet(45/60 Pages) DAVICOM

45 / 60 page

DM9010BI

Industrial-temperature Single Chip Ethernet Controller with General Processor Interface

Preliminary

Version: DM9010BI--DS-P01

January 12, 2010

9.11 Power Reduced Mode

The Signal detect circuit is always turned to monitor whether

there is any signal on the media (cable disconnected). The

DM9010BI automatically turns off the power and enters the

Power Reduced mode, whether its operation mode is

N-way or force mode. When enters the Power Reduced

mode, the transmit circuit still sends out fast link pules with

minimum power consumption. If a valid signal is detected

from the media, which might be N-ways fast link pules,

10Base-T normal link pules, or 100Base-TX MLT3 signals,

the device will wake up and resume a normal

operation mode.

That can be writing Zero to PHY Reg.16.4 to disable Power

Reduced mode.

9.11.1 Power Down Mode

The PHY Reg.0.11 can be set high to enter the Power

Down mode, which disables all transmit, receive functions

and MII interface functions, except the MDC/MDIO

management interface.

9.11.2 Reduced Transmit Power Mode

The additional Transmit power reduction can be

gained by designing with 1.25:1 turns ration magnetic

on its TX side and using a 8.5KΩ resistor on BGRES

and AGND pins, and the TXO+/TXO- pulled high

resistors should be changed from 50Ω to 78Ω. This

configuration could be reduced about 20% transmit

power.

DM9010BI Datasheet(PDF) 45 Page - Davicom Semiconductor, Inc.