Multiplex communications – Wide area network – Packet switching
Patent
1995-06-28
1998-08-04
Shin, Christopher B.
Multiplex communications
Wide area network
Packet switching
3952002, 395872, 395891, 370363, 370366, G06F 1300
Patent
active
057907862
ABSTRACT:
A multi-media-access-controller (henceforth "multi-MAC") in accordance with this invention includes a plurality of transmit data path circuits and a plurality of receive data path circuits that respectively transmit and receive data serially on a corresponding plurality of network buses, a single transmit data path controller and a single receive data path controller that monitor status of and control operation of the respective transmit and receive data path circuits. Use of only two data path controllers eliminates the plurality of MACs used in prior art devices and therefore results in significant savings in die area. Use of a single CRC calculator also results in savings in die area.
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International Standard ISO/IEC 8802-3:1992 (Information Technology--Local and Metropolitan Area Networks--Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications), Third Edition, The Institute of Electrical and Electronic Engineers, Inc., 1992, pp. 31-41, 43-47, 49-78, 81-119, and 121-149.
DP83934 LAN Data Book, National Semiconductor Corporation, Santa Clara, California, Undated (prior to Jun. 28, 1995), pp. 1-468 to 1-477.
"Document X", Materials submitted under seal which are considered to be proprietary and which are being submitted for consideration under MPEP .sctn. 724.
Myers, Jr. Roy T.
Wakeman Larry N.
National Semiconductor Corporation
Shin Christopher B.
Suryadevara Omkar K.
Winters Paul J.
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