參數(shù)資料
型號(hào): 9880
廠商: Intel Corp.
英文描述: Advanced 10/100 Repeater with Intergrated Management
中文描述: 高級(jí)10/100中繼器與綜合管理
文件頁(yè)數(shù): 52/118頁(yè)
文件大?。?/td> 1648K
代理商: 9880
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LXT9860/9880
Advanced 10/100 Repeater with Integrated Management
52
Datasheet
Document #: 248987
Revision#: 003
Rev Date: 08/07/01
3.10
Serial Management I/F
The high-speed Serial Management Interface (SMI) provides access to repeater MIB variables,
RMON Statistics attributes and status and control information. A network manager accesses the
interface through a simple serial communications controller such as an 8530 SCC. The SMI allows
multiple LXT98x0 devices to be managed from one common bus.
3.10.1
SMI Signals
The interface consists of a data input line (SRX), data output line (STX), and a clock (SERCLK).
The interface operates on a simple command response model, with the network manager as the
master and the LXT98x0 devices as slaves.
Figure 11
is a simplified view of typical serial
management interface architecture. Refer to
Figure 23 on page 68
for circuit details.
Note:
Refer to Application Note 64,
High-Speed Serial Management Interface,
for additional
information.
Figure 10. LXT9880 MII Operation
MII
n
_TXD<3:0>
MII
n
_TXEN
MII
n
_TXER
MII
n
_TXCLK
MII
n
_RXCLK
MII
n
_RXD<3:0>
MII
n
_RXDV
MII
n
_RXER
MII
n
_CRS
MII
n
_COL
LXT98x0
10/100
MAC
The two LXT98x0 MII ports act
as the PHY side of the MII. An
external MAC sends TX Data to
the LXT98x0 to be repeated to
the network. The LXT98x0
repeats network data to the MAC
via the RX Data lines.
Port 1
Port 2
Port 3
Port 4
Port 5
Ports 1, 2
TP Ports
MII Ports
Port 6
Port 7
Port 8
Figure 11. Typical SMI Bus Architecture
LXLXT9880
LXT918
RMON &
Repeater MIB
Support
Serial
Controller
Network
Management
User
Definable
Partitioning
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