參數(shù)資料
型號: AM79C981JC
廠商: ADVANCED MICRO DEVICES INC
元件分類: 網(wǎng)絡接口
英文描述: Integrated Multiport Repeater Plus⑩ (IMR+⑩)
中文描述: DATACOM, ETHERNET TRANSCEIVER, PQCC84
封裝: PLASTIC, LCC-84
文件頁數(shù): 12/40頁
文件大?。?/td> 347K
代理商: AM79C981JC
AMD
PRELIMINARY
1–82
Am79C981
ARBITER
Am79C981
IMR+ Chip
1
ACK
COL
RST
X1
ACK
COL
RST
X1
DAT
JAM
REQ
DAT
JAM
ACK
COL
RST
X1
DAT
JAM
D FF
CK
Q
D
XTAL
OSC.
ASYNC
RESET
1/2 ’74
COL
ACK
ACK
REQ
REQ
REQ
Am79C981
IMR+ Chip
2
Am79C981
IMR+ Chip
3
Bus transceivers needed
if DAT and JAM buses
exceed 100 pF loading.
A
B
DIR
Note 1
Note 1:
Direction
DIR
B
A
A
B
LOW
HIGH
17306B-5
REQ2 REQ3 REQ1
Figure 1. Multiple IMR+ Devices
Modular Repeater Design
The expansion port of the IMR+ chip also allows for
modular expansion. By sharing the arbitration duties be-
tween a backplane bus architecture and several sepa-
rate repeater modules one can build an expandable
repeater based on modular ‘plug-in’ cards. Each
repeater module performs the local arbitration function
for the IMR+ devices on that module, and provides sig-
nals to the backplane for use by a global arbiter.
For more detailed information, see AMD’s IEEE 802.3
Repeater Technical Manual, PID# 17314A.
相關(guān)PDF資料
PDF描述
AM79C982 basic Integrated Multiport Repeater (bIMR)
AM79C982-4JC basic Integrated Multiport Repeater (bIMR)
AM79C982-8JC basic Integrated Multiport Repeater (bIMR)
AM79C983AKC Integrated Multiport Repeater 2 (IMR2⑩)
AM79C984 enhanced Integrated Multiport Repeater (eIMR⑩)
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