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參數(shù)資料
| 型號： | DM8108 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 8 port 10/100M Fast Ethernet Switching Controller |
| 中文描述： | 8端口10/100M快速以太網(wǎng)交換控制器 |
| 文件頁數(shù)： | 10/35頁 |
| 文件大?。?/td> | 371K |
| 代理商： | DM8108 |
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DM8108
8 port 10/100M Fast Ethernet Switching Controller
10
Preliminary
Version: DM8108-DS-P02
November 25, 1999
optional
Functional Description
Fast Ethernet Ports Functional Overview
The DM8108 is a high-performance, low-cost Fast
Ethernet Switching Controller which provides packet
switching between eight on-chip, 10/100 Mbps ports
and one optional expansion port. It is suitable for the
auto-sensing 10/100Mbps switch application.
Switching Architecture
The switching architecture is based on the shared memory
and handshaking signals to switch packets between on-chip
ports hard-wired.
For an incoming packet, the receiving ports MAC stores it in
the receiving buffers if it is a good packet. At the same
time, the switching engine determines which port the packet
will forward to and update the address table which will be
used for future packet forwarding reference.
Fast Ethernet Ports
The DM8108 integrates eight Fast Ethernet ports, working
at 10/100Mbps (half-duplex) or 20/200Mbps (full-duplex)
with off-the-shelf PHY chips. The interface is glue-less
through Media Independent Interfaces (MII). The auto-
negotiation function determines the port’s operating mode.
With auto-negotiation disabled, the ports can be forced to
operate at a certain mode, if so desired. Each port includes
the Media Access Control function (MAC), LED signals for
Link, Collision, Receive/Transmit, Half/Full duplex and
Receive Buffer Full indications.
Address Recognition
The DM8108 in a system can recognize up to 16K Uni-cast
MAC addresses and unlimited Multicast/Broadcast MAC
addresses. An intelligent address recognition mechanism
enables filtering and forwarding packets at full Ethernet wire
speed. The DM8108 provides an address self-learning
mechanism. As each DM8108 learns new address, it
updates the address table in the storage.
Fig.1: Typical 10/100 Mbps auto-sensing switching hub application
Switch Ports Switch Ports
DM8108
10/100 Mbps PHY
MEM
MEM
DM8108
10/100 Mbps PHY
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| DM7123J | 2-Input Digital Multiplexer |
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相關(guān)代理商/技術(shù)參數(shù) |
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| DM-810A | 功能描述:數(shù)字萬用表 DMM,TRMS 1000V AC/DC 600mA to 10A RoHS:否 制造商:Tektronix 產(chǎn)品:Multimeters 類型:Bench 準(zhǔn)確性:0.04 % 電壓范圍:2 V to 2 kV 電阻范圍: 電容范圍: 顯示計數(shù): 頻率:10 Hz to 45 Hz, 850 Hz to 1 MHz 測距: 真均方根值: 數(shù)據(jù)保持: |
| DM-810A-C | 功能描述:數(shù)字萬用表 DMM,TRMS 1000V AC/DC 600mA to 10A, CALIB RoHS:否 制造商:Tektronix 產(chǎn)品:Multimeters 類型:Bench 準(zhǔn)確性:0.04 % 電壓范圍:2 V to 2 kV 電阻范圍: 電容范圍: 顯示計數(shù): 頻率:10 Hz to 45 Hz, 850 Hz to 1 MHz 測距: 真均方根值: 數(shù)據(jù)保持: |
| DM8121J/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Input Digital Multiplexer |
| DM8121N/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Input Digital Multiplexer |
| DM8121N/B+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Input Digital Multiplexer |
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