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參數(shù)資料
| 型號： | 9860 |
| 廠商： | Intel Corp. |
| 英文描述： | Advanced 10/100 Repeater with Intergrated Management |
| 中文描述： | 高級10/100中繼器與綜合管理 |
| 文件頁數(shù)： | 32/118頁 |
| 文件大?。?/td> | 1648K |
| 代理商： | 9860 |
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LXT9860/9880
—
Advanced 10/100 Repeater with Integrated Management
32
Datasheet
Document #: 248987
Revision#: 003
Rev Date: 08/07/01
3.2
Port Configuration
The LXT98x0 powers up in auto-negotiation mode for all twisted-pair ports. Software can monitor
or change the configuration through the PHY Port Control Register.
3.2.1
Auto-Negotiation
All TP ports on power up are configured to establish its link via auto-negotiation. The port and its
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. The FLP bursts sent by the port are
maintained in its auto-negotiation advertisement register (
Table 71 on page 107
). The link partner
’
s
abilities are stored in the auto-negotiation link partner register (
Table 66 on page 104
). Status can
be observed in the respective auto-negotiation status register (
Table 65 on page 104
). Each port has
its own advertisement, link partner advertisement, auto-negotiation expansion, auto-negotiation
status registers, and control register.
The advertisement register is read-only, except for bits 5, 7, and 13. The LXT98x0 can advertise
100 Mbps half-duplex and/or 10 Mbps half-duplex; it never advertises full duplex.
If the link partner does not support auto-negotiation, the LXT98x0 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 and updates the status registers appropriately.
Figure 3. Typical LXT988x Managed Repeater Architectures
LXT9880 IC
Bac10Mbps
ManagDevice
10BASE-T
Rep10BASE-T
R10BASE-T
Rep100X
LED
Drivers
RMON &
SNRMON &
CountSNMP
10 Mbps
Back10 Mbps
100 MbBackpl100X
Back100 Mbps
Bac100Mbps
Serial
Port
PHY
10/100
PHY
MII
MII
10/100
PHY
10/100
PHY
PHY
10/100
PHY
10/100
PHY
10/100
PHY
ManaDevice
Management
100BASE10/100
Repeater
LED
DrivLED
CouSNMP
Serial
Port
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
RMON10/100
Counters
BackplaDevice
Serial
Port
MII
MII
Serial
Management to
SCC
Buffer
1
B
100M Backplane
Buffer
10M Backplane
MII to MII Bridge
1
B
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