參數(shù)資料
型號(hào)： AM79C982
廠商： Advanced Micro Devices, Inc.
英文描述： basic Integrated Multiport Repeater (bIMR)
中文描述： 基本綜合多端中繼器（bIMR）
文件頁(yè)數(shù)： 1/26頁(yè)
文件大?。?/td> 254K
代理商： AM79C982
PRELIMINARY
This document contains information on a product under development at Advanced Micro Devices. The
information is intended to help you evaluate this product. AMD reserves the right to change or discontinue
work on this proposed product without notice.
Publication#
19406
Issue Date:
January 1999
Rev:
B
Amendment/
0
1-
3
Am79C982
b
asic Integrated Multiport Repeater (
b
IMR)
DISTINCTIVE CHARACTERISTICS
Fully backward-compatible with existing
IMR/IMR+ device non-managed hub designs
— Pin/socket-compatible with the Am79C980
(IMR) and Am79C981 (IMR+) devices
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Repeater functions comply with IEEE 802.3
Repeater Unit specifications
Four and eight 10BASE-T port options available
Low-cost, flexible solutions suitable for
non-managed repeater designs
Integral 10BASE-T transceivers utilize the
required predistortion transmission technique
Attachment unit interface (AUI) port allows
connectivity with 10BASE-5 (Ethernet) and
10BASE-2 (Cheapernet) networks, as well as
10BASE-F and/or Fiber Optic Inter-Repeater
Link (FOIRL) segments
Minimum mode facilitates LED implementation
and provides four LED display options for port
status
Built-in pulse stretching for carrier sense LED
display
On-board PLL, Manchester encoder/decoder,
LED display and FIFO
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Expandable to increase number of repeater
ports
All ports can be separately isolated (partitioned)
in response to excessive collision conditions or
fault conditions
Network management and optional features are
accessible through a dedicated serial
management port
Twisted-pair Link Test capability conforming to
the 10BASE-T standard. The receive Link Test
function can be optionally disabled through the
management port to facilitate interoperability
with devices that do not implement the Link Test
function
Programmable option of Automatic Polarity
Detection and Correction permits automatic
recovery due to wiring errors
Full amplitude and timing regeneration for
retransmitted waveforms
Preamble loss effects eliminated by deep FIFO
CMOS device features high integration and low
power with a single +5 V supply
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GENERAL DESCRIPTION
The
b
asic Integrated Multiport Repeater (
is a VLSI circuit that provides a system-level solution to
designing a compliant 802.3 repeater incorporating
10BASE-T transceivers. The device integrates the
Repeater functions specified by Section 9 of the
IEEE 802.3 standard and twisted-pair Transceiver
functions complying to the 10BASE-T standard. The
Am79C982-4 provides four and the Am79C982-8 pro-
vides eight integral twisted-pair medium attachment
units (MAUs), and an attachment unit interface (AUI)
port in an 84-pin plastic leaded chip carrier (PLCC).
b
IMR) chip
A network based on the 10BASE-T standard uses un-
shielded twisted-pair cables, therefore providing an
economical solution to networking by allowing the use
of low-cost unshielded twisted-pair (UTP) cable or
existing telephone wiring.
The total number of ports per repeater unit can be in-
creased by connecting multiple
their expansion ports, hence minimizing the total cost
per repeater port. Furthermore, a general-purpose
attachment unit interface (AUI) provides connection
capability to 10BASE-5 (Ethernet) and 10BASE-2
(Cheapernet) coaxial networks, as well as 10BASE-F
and/or Fiber Optic Inter-Repeater Link (FOIRL) fiber
segments. Network management and test functions
are provided through TTL-compatible I/O pins.
b
IMR devices through
The device is fabricated in CMOS technology and
requires a single +5 V supply.
相關(guān)PDF資料
PDF描述
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)
AM79C984A enhanced Integrated Multiport Repeater (eIMR⑩)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AM79C982-4JC 制造商:Advanced Micro Devices 功能描述:LAN HUB CONTROLLER, 84 Pin, PLCC
AM79C982-8JC 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:basic Integrated Multiport Repeater (bIMR)
AM79C983 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Am79C983 Datasheet? 348KB (PDF) Integrated Multiport Repeater 2 IMR2 ?
AM79C983A 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:Integrated Multiport Repeater 2 (IMR2⑩)
AM79C983AKC 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:Integrated Multiport Repeater 2 (IMR2⑩)
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