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參數(shù)資料
| 型號： | KS8999I |
| 廠商： | Micrel Inc |
| 文件頁數(shù)： | 1/52頁 |
| 文件大小： | 0K |
| 描述： | IC SWITCH 9-PORT 10/100 208-PQFP |
| 標(biāo)準(zhǔn)包裝： | 100 |
| 系列： | * |
| 類型： | * |
| 應(yīng)用： | * |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 208-MQFP，208-PQFP |
| 供應(yīng)商設(shè)備封裝： | 208-PQFP（28x28） |
| 包裝： | 散裝 |
| 配用： | 576-1023-ND - BOARD EVAL EXPERIMENT FOR KS8999 |
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January 2005
1
KS8999
Micrel
KS8999
Integrated 9-Port 10/100 Switch with PHY and Frame Buffer
Rev. 1.14
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
(Media Independent Interface). Useful configurations include
a stand alone eight port switch as well as a eight port switch
with a routing element connected to the extra MII port. The
additional port is also useful for a public network interfacing.The
Micrel, Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 474-1000 http://www.micrel.com
Functional Diagram
P
H
Y
1
Look Up
Engine
(1K Entries)
SRAM
Buffers
FIFO, Flow Control, VLAN and Priority
Queue Priority
Management
Buffer
Management
LED
and
Programming
Interface
LED[1][3:0]
LED[2][3:0]
LED[3][3:0]
LED[4][3:0]
LED[5][3:0]
EEPROM /
Processor
Interface
SCL
SDA
LED[6][3:0]
LED[7][3:0]
LED[8][3:0]
LED[9][3:0]
MII /
SNI
(exclusive)
External
Interface
MRXD[3:0]
MRXDV
MCOL
MTXD[3:0]
MTXEN
MTXER
MRXC
MRXD[0]
MRXDV
MCOL
MTXD[0]
MTXEN
MRXC
S
N
I
M
I
MTXC
MCRS
MTXC
M
A
C
1
P
H
Y
2
M
A
C
2
P
H
Y
3
M
A
C
3
P
H
Y
4
M
A
C
4
P
H
Y
5
M
A
C
5
P
H
Y
6
M
A
C
6
P
H
Y
7
M
A
C
7
P
H
Y
8
M
A
C
8
M
A
C
9
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.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
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