參數(shù)資料
型號(hào)： 9883
廠商： Intel Corp.
英文描述： Advanced 10/100 Umnmanaged Repeater
中文描述： 高級(jí)10/100 Umnmanaged直放站
文件頁(yè)數(shù)： 17/56頁(yè)
文件大?。?/td> 719K
代理商： 9883
Advanced 10/100 Unmanaged Repeater
—
LXT9883/9863
Datasheet
Document #: 249115
Revision #: 003
Rev. Date: 08/07/01
17
This multi-port repeater provides six (LXT9863) or eight (LXT9883) 10BASE-T/100BASE-TX
ports. In addition, each device also provides two Media Independent Interface (MII) expansion
ports that may be connected to 10/100 MACs.
The LXT98x3 provides two repeater state machines and two Inter-Repeater Backplanes (IRB) on a
single chip
—
one for 10 Mbps and one for 100 Mbps operation. The 100 Mbps repeater meets IEEE
802.3 Class II requirements. The auto-negotiation capability of the LXT98x3 allows it to
communicate with connected nodes and configure itself accordingly.
The segmented backplane simplifies dual-speed operation, and allows multiple devices to be
stacked and function as one logical Class II repeater. Up to 240 ports (192 TP ports and 48 MII
ports) can be supported in a single stack.
3.2
Port Configuration
The LXT98x3 powers up in auto-negotiation mode for all twisted-pair ports.
3.2.1
Auto-Negotiation
All TP ports on power-up are configured to establish link via auto-negotiation. The port and link
partner establish link conditions by exchanging Fast Link Pulse (FLP) bursts. Each FLP burst
contains 16 bits of data advertising the port
’
s capabilities. If the link partner does not support auto-
negotiation, the LXT98x3 determines link state by listening for 100 Mbps IDLE symbols or 10
Mbps link pulses. If it detects either of these signals, it configures the port accordingly.
Figure 3. Typical LXT9883 Repeater Architecture
LXT9883 IC
Bac10 Mbps
ManagDevice
10BASE-T
Re10BASE-T
R10BASE-T
Repeater
Rep100X
LED
Drivers
RMON &
SNRMON &
CountSNMP
10 Mbps
Back10 Mbps
100 MbBackpl100X
Back100 Mbps
Ba100 Mbps
10/100
PHY
10/100
PHY
MII
MII
10/100
PHY
10/100
PHY
10/100
PHY
10/100
PHY
10/100
PHY
10/100
PHY
Management
100BASE-X
Repeater
LED
DrivLED
Counters
10/1PHY
P10/100
10/1PHY
P10/100
MII
MII
10/1PHY
P10/100
10/1PHY
P10/100
10/1PHY
P10/100
PHY
10/100
P10/100
10/1PHY
P10/100
10/1PHY
P10/100
Drivers
BackplaDevice
MII
MII
Buffer
1
B
100M Backplane
Buffer
10M Backplane
MII to MII Bridge
1
B
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