DM9161C_1 Datasheet, PDF (1/2 Pages) Davicom Semiconductor, Inc. – 10/100 Mbps Fast Ethernet Physical Layer Single Chip Transceiver

DM9161C
10/100 Mbps Fast Ethernet Physical Layer Single Chip Transceiver
1. Features
● Fully complies with IEEE 802.3 / IEEE
802.3u 10Base-T/ 100Base-TX, ANSI
X3T12 TP-PMD 1995 standards
● 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
mask-able interrupt output capability
● Provide Loopback mode for easy system
diagnostics
2. General Description
DAVICOM’s DM9161C is a physical layer, low
power, and single-chip 10BASE-T/100BASE-TX
transceiver specifically designed for consumer
electronics, industrial, and enterprise
applications. Through using a CMOS process,
the DM9161C has the advantage of ensuring
both high performance and savings in power
consumption.
Through utilization of automatic media speed
and protocol selection, the auto-negotiation
function is strongly supported in the DM9161C.
Then due to the built-in wave shaping filter, the
DM9161C has a significant convenience of not
requiring an external filter to transport signals to
the media in 10BASE-T or 100BASE-TX during
Ethernet operation.
Preliminary
Version: 1.1
2012/2/21
● 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:
o Power Reduced mode (cable
detection)
o Power Down mode
o Selectable TX drivers for 1:1 or
1.25:1 transformers for additional
power reduction. 1.25: 1
transformers only when HP
Auto-MDIX Disable.
● Compatible with 3.3V and 5.0V tolerant
I/Os
● Pin to pin Compatible with DM9161A/B
● DSP architecture PHY Transceiver.
● 48-pin LQFP- 0.18um process
Through its Media Independent Interface (MII),
the DM9161C not only connects the Medium
Access Control (MAC) layer, but the MII also
ensure a high inter-operability and flexibility with
different vendors. In media usage applications,
the DM9161C provides a direct interface either
to an Unshielded Twisted Pair Category 5 Cable
(UTP5) for 100BASE-TX Fast Ethernet, or an
UTP5/UTP3 Cable for 10BASE-T Ethernet.
The DM9161C contains the entire physical layer
functions of 100BASE-TX. Those physical layer
functions are defined by IEEE802.3u include 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).
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