Datasheet > KSZ8999I

KSZ8999I

更新时间： 2024-11-06 03:48:51

品牌	Logo	应用领域
麦瑞 - MICREL		电信集成电路开关 PC 局域网局域网（LAN）标准
页数	文件大小	规格书
52页	276K
描述
Integrated 9-Port 10/100 Switch with PHY and Frame Buffer

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KSZ8999I 数据手册

KS8999

Micrel

KS8999

Integrated 9-Port 10/100 Switch with PHY and Frame Buffer

Rev. 1.14

KS8999 is designed to reside in an unmanaged design not

requiring processor intervention. This is achieved through

I/O strapping or EEPROM programming at system reset

time.On the media side, the KS8999 supports 10BaseT,

100BaseTX and 100BaseFX as specified by the IEEE 802.3

committee. Physical signal transmission and reception are

enhanced through use of analog circuitry that makes the

design more efficient and allows for lower power consump-

tion and smaller chip die size.

General Description

The KS8999 contains eight 10/100 physical layer transceiv-

ers, nine MAC (Media Access Control) units with an inte-

grated layer 2 switch. The device runs in two modes. The first

mode is an eight port integrated switch and the second is as

a nine port switch with the ninth port available through an MII

(MediaIndependentInterface).Usefulconfigurationsinclude

a stand alone eight port switch as well as a eight port switch

with a routing element connected to the extra MII port. The

additionalportisalsousefulforapublicnetworkinterfacing.The

Data sheets and support documentation can be found on

Micrel’s web site at www.micrel.com.

Functional Diagram

Look Up

Queue Priority

Engine

Buffer

Management

SRAM

Buffers

Management

(1K Entries)

FIFO, Flow Control, VLAN and Priority

MRXD[3:0]

MRXDV

MCOL

MCRS

MTXD[3:0]

MTXEN

MTXER

MII /

SNI

(exclusive)

MTXC

MRXC

MRXD[0]

MRXDV

MCOL

External

Interface

MTXD[0]

MTXEN

LED[1][3:0]

LED[2][3:0]

LED[3][3:0]

SCL

SDA

LED

and

MTXC

MRXC

EEPROM /

Processor

Interface

LED[4][3:0]

LED[5][3:0]

LED[6][3:0]

LED[7][3:0]

LED[8][3:0]

LED[9][3:0]

Programming

Interface

Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

January 2005

KS8999

12 3 4 5 6 7...52

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