參數(shù)資料
型號(hào): AM79C940VCW
廠商: ADVANCED MICRO DEVICES INC
元件分類: 微控制器/微處理器
英文描述: Media Access Controller for Ethernet (MACE)
中文描述: 4 CHANNEL(S), 10M bps, LOCAL AREA NETWORK CONTROLLER, PQFP80
封裝: TQFP-80
文件頁數(shù): 83/122頁
文件大小: 914K
代理商: AM79C940VCW
AMD
83
Am79C940
Attachment Unit Interface (AUI)
The AUI can drive up to 50 m of standard drop cable to
allow the transceiver to be remotely located, as is typi-
cally the case in IEEE 803.3 10BASE5 or thick Ether-
net
installations. For a locally mounted transceiver,
such as 802.3 10BASE2 or Cheapernet interface, the
isolation transformer requirements between the trans-
ceiver and the MACE device can be reduced.
When used with the Am79C98 TPEX
(Twisted Pair
Ethernet Transceiver), the isolation requirements of the
AUI are completely removed providing that the trans-
ceiver is mounted locally. For remote location of the
TPEX via an AUI drop cable, the isolation requirement is
necessary to meet IEEE 802.3 specifications for fault
tolerance and recovery.
CPU
Memory
Power
Supply
Local Bus
10BASE5/Ethernet
DTE
AUI
Cable
MAU
Tap
Am7996
Transceiver
Ethernet
Coax
16235C-14
Am79C940
AUI-10BASE5/Ethernet Example
RG58
BNC “T”
System
CPU
Local
Memory
10BASE2/Cheapernet
Cheapernet
Coax
Power
Supply
Am7996
Transceiver
Am79C940
DMA
Engine
I/O Bus
16235C-15
AUI-10BASE2/Cheapernet Example
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