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參數(shù)資料
| 型號(hào)： | 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(yè)數(shù)： | 2/35頁(yè) |
| 文件大小： | 371K |
| 代理商： | DM8108 |
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DM8108
8 port 10/100M Fast Ethernet Switching Controller
2
Preliminary
Version: DM8108-DS-P02
November 25, 1999
Features
Low cost Fast Ethernet Switching Controller.
Provide packet switching functions between
eight
10/100Mbps, auto-negotiated on-chip Fast
Ethernet ports and a proprietary Full-duplex
Expansion port.
Cascade max. 8 DM8108s without extra glue
logic for 64-port configuration.
Incorporates three 802.3 compliant 10/100Mbps
Media Access Controllers
Direct interface to MII (Media Independent
Interface)
Half/Full Duplex Support for individual port (up-
to
200Mbps/port)
IEEE 802.3 100Base-TX, T4.FX compatible
Auto-negotiation supported through Serial MII
interface
High-performance Distributed Switching Engine
Performs packet forwarding and filtering at full
wire-speed
148,800 packets/sec. on each Ethernet port
Direct support for packet buffering
Glue-less interface with 1 or 2 Mbytes of SDRAM
(SGRAM)
32 bit memory bus configuration
66 Mhz – 90Mhz memory bus speed
Up-to 1.1K buffers, 1536-byte each, allocated to
receive ports
Support Store and Forward switching approach
Low last-bit to first-bit out delay
Allow mixed speed Ethernet packet switching
Allow conversion between different protocols
Flow control
Support partitioning function
Support back-pressure while lack of internal
resources
Support 802.3x PAUSE function in full duplex
mode
Support up to 4-port trunking for 800Mbps
bandwidth
Advanced Address Learning and Searching
Self learning mechanism
Cache 128 address entries internally
Record up-to 16K Uni-cast MAC addresses and
unlimited Multicast and Broadcast addresses
Automatic aging scheme
Broadcast filtering rate control
Expansion Bus
Up-to 8 SW devices can be cascaded via
expansion bus without extra logic
Full duplex mode transfer
Less Bus overhead
Automatic flow control
Complete status report to a simple LED interface
Suitable for low cost Switch market to replace
Hub
0.35
m process, 3.3V with 5V tolerant I/O
208-pin PQFP package
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