DAVICOM DM9161AEP

DM9161AEP Product Brief
10/100 Mbps Fast Ethernet Physical Layer Single Chip Transceiver
June 2008 Rev.1.0
The DM9161A is a physical layer, single-chip, and low power transceiver for
100BASE-TX and 10BASE-T operations. On the media side, 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), the DM9161A connects to the Medium
Access Control (MAC) layer, ensuring a high inter operability from different vendors.
TheDM9161A uses a low power and high performance advanced CMOS process. It
contains the entire physical layer functions of 100BASE-TX as defined by
IEEE802.3u, including the Physical Coding Sublayer (PCS), Physical Medium
Attachment (PMA), Twisted Pair Physical Medium Dependent Sublayer (TP-PMD),
10BASE-TX Encoder/Decoder (ENC/DEC), and Twisted Pair Media Access Unit
(TPMAU). The DM9161A provides a strong support for the auto-negotiation function,
utilizing automatic media speed and protocol selection. Furthermore, due to the
built-in wave shaping filter, the DM9161A needs no external filter to transport signals
to the media in 100BASE-TXBASE-TX or 10BASE-TBASE-T Ethernet operation.
Block Diagram
4B/5B
Encoder
Scrambler
25M OSCI
LED1-4#
TX CGM
LED
Driver
NRZ
to
NRZI
Parallel
to Serial
NRZI to
MLT-3
MLT-3
Driver
Rise/Fall
Time
CTL
100TXD+/-
AutoMDIX
25M CLK
125M CLK
MII
Signals
MII
Interface/
Control
4B/5B
Decoder
Codegroup
Alignment
Descrambler
Serial to
Parallel
NRZI
to
NRZ
MLT-3 to
NRZI
Adaptive
EQ
RXI+/-
RX
RXI+/-
TX
10TXD+/-
RX
CRM
Digital
Logic
10BASE-T
Module
Register
Collision
Detection
Carrier
Sense
AutoNegotiation
Specifications
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Fully comply with IEEE 802.3 / IEEE 802.3u 10Base-T/ 100Base-TX, ANSI
X3T12 TP-PMD 1995 standard
Support MDI/MDI-X auto crossover function (Auto-MDI)
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
Very Low 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, 48-pin LQFP
Application
VoIP CPE (ATA, IP Phone, Video Phone)
IP STB, IPC, Internet Radio
IP CAM, DVR, Router…
Ordering Information
Part Number
Pin Count
Package
DM9161AE
48
LQFP
DM9161AEP
48
LQFP(Pb-Free)
DAVICOM Semiconductor, Inc.
No.6, Li-Hsin Rd.VI, Science Park, Hsin-Chu, Taiwan, R.O.C.
TEL: 886-3-5798797
FAX: 886-3-5646929
E-mail: sales@davicom.com.tw