DM9161C

10/100 Mbps Fast Ethernet Physical Layer Single Chip Transceiver

Preliminary

1

Version: 1.1

2012/2/21

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

● 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

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.

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).