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CDB8952

Advanced Product Databook

Crystal LAN™ 10Base-T

and 100Base-X Transceiver

Evaluation Board

FEATURES

! IEEE 802.3 compliant 10Base-T and 100Base-X

Physical Interface.

! Media Supported:

— 10Base-T

— 100Base-TX

— 100Base-FX (with optional fiber transceiver installed)

! IEEE 802.3u MII Interface with extended register

support.

! LED indicators for Power, Link Status, Collision,

Full/Half Duplex, Transmit Activity, Receive

Activity, 100 Mb/s Speed, and 10 Mb/s Speed.

! Hardware configurable through jumper settings,

or software configurable through the MII interface.

! Operates from single 5 V supply, or may be

optionally configured for interface to 3.3 V MII.

DESCRIPTION

The CDB8952 Evaluation Board provides a platform for

evaluating the CS8952 10Base-T and 100Base-X

Transceiver. It is designed to plug into a transceiver test

box via a standard 40-pin MII connector. System de-

signers can use the CDB8952 to fully exercise the

CS8952 without the time and expense of custom

prototyping.

Though the CBD8952 is configured from the factory for

5 V operation with the power supplied from the test box,

it may also be configured for 3.3 V MII systems.

The CDB8952 may be optionally configured with a fiber

interface module for 100Base-FX testing.

ORDERING INFORMATION

CS8952-CQ 0° to +70° C 100-pin TQFP

CDB8952 Evaluation Board

TEST RESET

HDR35

HDR1

C26

HDR42

C28

C27

HDR34

TP2

C46

S2 S1

HDR4

TXCLK

TST1

MIIDRV

MII_PWR +5V

C1 C3

TP1

HDR15

HDR5

HDR6

HDR7

HDR43

POWER

LED8

LED6

LED7

LED1

LED2

LED3

LED4

LED5

FDX

LNK

SPD100

SPD10

PHYAD4

PHYAD3

PHYAD2

PHYAD1

PHYAD0

TP4

AN0

AN1

TXS0

TXS1

TCM

CS8952

Shielded

RJ45

HFBR-5103

Fiber

Transceiver

MII

Isolation

Transformer

COL

CDB8952 REV. B EVALUATION BOARD

DS206DB2 OCT ‘01

CIRRUS LOGIC ADVANCED PRODUCT DATABOOK

Summary of content (12 pages)

PAGE 1
CDB8952 Advanced Product Databook FEATURES Crystal LAN™ 10Base-T and 100Base-X Transceiver Evaluation Board ! IEEE 802.3 compliant 10Base-T and 100Base-X Physical Interface. ! Media Supported: — 10Base-T — 100Base-TX — 100Base-FX (with optional fiber transceiver installed) DESCRIPTION ! IEEE 802.3u MII Interface with extended register support. The CDB8952 Evaluation Board provides a platform for evaluating the CS8952 10Base-T and 100Base-X Transceiver.
PAGE 2
CDB8952 Crystal LAN™ 10Base-T and 100Base-X Transceiver INTRODUCTION This manual provides information specifically on the CDB8952 Evaluation board and generally on any design incorporating the CS8952 CrystalLANTM 10Base-T and 100Base-X Transceiver. The reader should have a general knowledge of hardware design and Ethernet operation. Background Information • IEEE Std 802.3u-1995 (ISO/IEC 8802.3:1996) CSMA/CD Access Method and Physical Layer Specifications • IEEE Std 802.
PAGE 3
CDB8952 Crystal LAN™ 10Base-T and 100Base-X Transceiver NOTE: Physical address 00000 is a special broadcast address. All devices will respond to this address in addition to the one selected using S3. Setting S3 to 00000 will cause the CS8952 to set the ISOLATE bit in the Basic Mode Control Register, isolating itself from all MII signals except MDC and MDIO. It will remain isolated until this bit is cleared.
PAGE 4
CDB8952 Crystal LAN™ 10Base-T and 100Base-X Transceiver Pins Function 1-2 Low Power Start 3-4 5-6 7-8 9-10 11-12 13-14 15-16 17-18 19-20 Description The CS8952 will enter a low power mode following reset. Only the circuitry necessary to maintain media impedance and the MII Serial Management Interface will be operational. The CS8952 checks the status of these pins only during power-on or reset. A reset or power cycle is required before any changes in this jumper setting will take effect.
PAGE 5
CDB8952 Crystal LAN™ 10Base-T and 100Base-X Transceiver 3.3V Power Supply Option BOARD ASSEMBLY NOTES Outlined below are several different way to supply power to the CDB8952 evaluation board. Magnetics Vendors 5 V Supplied Through the MII Connector - When the CDB8952 is connected to a system which supplies +5 V through the MII connector, J5 and J6 may be connected together via a short cable. Alternatively, J6 may be connected to an external +5 V supply and J5 left unconnected.
PAGE 6
CDB8952 Crystal LAN™ 10Base-T and 100Base-X Transceiver The X-1000 state machine is dependent on TX_CLK resulting in a mutually exclusive condition. It will not de-assert TX_EN without TX_CLK present. This behavior has only been seen on Netcom X-1000 test hardware. Work-around: Power on the X-1000 with the Netcom supplied transceivers. Remove one or both transceivers and replace with the CBD8952. This incompatibility will be addressed in Rev C. of the CS8952.
PAGE 7
CDB8952 Crystal LAN™ 10Base-T and 100Base-X Transceiver Figure 1.
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CDB8952 Figure 2.
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CDB8952 Figure 3.
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CDB8952 Figure 4.
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CDB8952 Crystal LAN™ 10Base-T and 100Base-X Transceiver CDB8952 BILL OF MATERIALS Ref. Des.
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