DAVICOM DM9161BIEP

DM9161BIEP Product Brief
10/100 Mbps Fast Ethernet Physical Layer Single Chip Transceiver
November 2008 Rev.1.0
The DM9161BI is a physical layer, single-chip, and low power transceiver for
100BASE-TX and 10BASE-T operations. Supports Industrial-grade: -40℃.~ +85℃,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 DM9161BI connects to the Medium
Access Control (MAC) layer, ensuring a high inter operability from different vendors.
TheDM9161BI 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 DM9161BI 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 DM9161BI 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.
Supports Industrial-grade: -40℃.~ +85℃,
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Compatible with 3.3V and 5.0V tolerant I/Os, 48-pin LQFP, 0.18 um process
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Application
VoIP CPE (ATA, IP Phone, Video Phone)
IP STB, IPC, Internet Radio
IP CAM, DVR, Router…
Ordering Information
Part Number
Pin Count
Package
DM9161BIEP
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