DM9161B 查看數據表（PDF） - Davicom Semiconductor, Inc.
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DM9161B Datasheet PDF : 45 Pages
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DM9161B
10/100 Mbps Fast Ethernet Physical Layer Single Chip Transceiver
1. General Description
DAVICOM’s DM9161B is a physical layer, single-chip,
and low power 100BASE-TX/10BASE-T transceiver
specifically designed for consumer electronics, industrial and
enterprise applications. For the media usage, it provides
a direct interface either to Unshielded Twisted Pair
Category 5 Cable (UTP5) for 100BASE-TX Fast
Ethernet, or UTP5/UTP3 Cable for 10BASE-T
Ethernet.
Through the Media Independent Interface (MII),
DM9161B not only connects the Medium Access
Control (MAC) layer but also ensur a high inter
operability from different vendors.
TheDM9161B uses a CMOS process which has
advantages of power consumption saving and high
performance .
It contains the entire physical layer functions of
100BASE-TX which is defined by IEEE802.3u,
including the Physical Coding Sub layer (PCS),
Physical Medium Attachment (PMA), Twisted Pair
Physical Medium Dependent Sub layer (TP-PMD),
10BASE-TX Encoder/Decoder (ENC/DEC), and
Twisted Pair Media Access Unit (TPMAU).
The DM9161B provides a strong support for the
auto-negotiation function, utilizing automatic media
speed and protocol selection. In the bargain, , the
DM9161B needs no external filter to transport signals
to the media in 100BASE-TX or 10BASE-T Ethernet
operation because of the built-in wave shaping filter..
2. Features
Fully comply with IEEE 802.3 / IEEE 802.3u 10Base-T/
100Base-TX, ANSI X3T12 TP-PMD 1995 standard
Support HP MDI/MDI-X auto crossover function
(HP Auto-MDIX)
Support Auto-Negotiation function, compliant with IEEE
802.3u
Fully integrated Physical layer transceiver On-chip
filtering with direct interface to magnetic transformer
Selectable repeater or node mode
Selectable MII or RMII (Reduced MII) mode for
100Base-TX and 10Base-TX. Selectable MII or GPSI
(7-Wired) mode for 10Base-T
Selectable full-duplex or half-duplex operation
MII management interface with maskable interrupt
output capability
Provide Loopback mode for easy system
diagnostics
LED status outputs indicate Link/ Activity, Speed10/100
and Full-duplex/Collision. Support Dual-LED optional
control
Single low power Supply of 3.3V with an advanced
CMOS technology
Lower Power consumption modes:
● Power Reduced mode (cable detection)
● Power Down mode
● Selectable TX drivers for 1:1 or 1.25:1 transformers
for additional power reduction. 1: 1 transformers only
when HP Auto-MDIX Enable.
Compatible with 3.3V and 5.0V tolerant I/Os
Pin to pin Compatible with DM9161A.
DSP architecture PHY Transceiver.
48-pin LQFP 0.18um process
Final
2
Version: DM9161B-12-DS-F01
October 16, 2009
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