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AM79C983A

Advanced Micro Devices
Part Number AM79C983A
Manufacturer Advanced Micro Devices
Description Integrated Multiport Repeater-2
Published Mar 26, 2005
Detailed Description PRELIMINARY Am79C983A Integrated Multiport Repeater 2 (IMR2™) DISTINCTIVE CHARACTERISTICS n Repeater functionality comp...
Datasheet PDF File AM79C983A PDF File

AM79C983A
AM79C983A

Overview
PRELIMINARY Am79C983A Integrated Multiport Repeater 2 (IMR2™) DISTINCTIVE CHARACTERISTICS n Repeater functionality compliant with IEEE 802.
3 Repeater Unit specifications n Hardware implementation of Management Information Base (MIB) with all of the counters, attributes, actions, and notifications specified by IEEE 802.
3 Section 19 (Layer Management) n Twelve pseudo AUI (PAUI™) ports to support multiple media types via direct connection to external transceivers n One IEEE-compliant AUI port n One reversible AUI (RAUI™) port that can be programmed as a second AUI port or used to connect directly to a media access controller (MAC) n Direct interface with the AMD Am79C988A QuIET™ (Quad Integrated Ethernet Transceiver) to support 10BASE-T repeater designs n Port switching support to allow individual ports to be switched between multiple Ethernet backplanes under software control n Remote Monitoring (RMON) Register Bank to provide direct support for etherStatsEntry and etherStatsHistory object groups of the RMON MIB (IETF RFC1757) n Packet Report Port to provide packet information for deriving objects in the Host, HostTopN, and Matrix groups of the RMON MIB (IETF RFC1578) n Two user-selectable expansion bus modes: IMR/IMR+ compatible mode and asynchronous mode n Simple 8-bit microprocessor interface n Full LED support n 132-pin PQFP CMOS device with a single 5-V supply GENERAL DESCRIPTION The Am79C983A Integrated Multiport Repeater 2 (IMR2) chip is a VLSI integrated circuit that provides a system-level solution to designing intelligent (managed) multiport repeaters.
When the IMR2 device is combined with the Quad Integrated Ethernet Transceiver (QuIET) device, it provides a cost-effective solution to designing 10BASE-T managed repeaters.
The IMR2 device integrates the repeater functions specified by Section 9 (Repeater Unit) and Section19 (Layer Management for 10 Mb/s Baseband Repeaters) of the IEEE 802.
3 standard.
The Am79C983A IMR2 device provides 1 standard Attachment Uni...


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