Multiplex communications – Wide area network – Packet switching
Patent
1995-05-01
1996-04-09
Bowler, Alyssa H.
Multiplex communications
Wide area network
Packet switching
3952002, 395834, 37011001, 370 31, 364DIG2, 3642409, 364240, 3642391, 364239, H04J 302, G06F 1338
Patent
active
055069657
ABSTRACT:
A slave mode/master mode switching flag, a switch 19, and a start bit 0/1 generator 20 are provided in a two-way communication device 1 incorporated in a microcomputer. In a slave mode, data transmission and reception are synchronized with a start bit over a communication line, and the communication device does not output a start bit for transmission. In a master mode, data transmission is synchronized with a start bit outputted from the communication device, and data reception is synchronized with a start bit over the communication line. The communication device outputs a start bit for communication data. Two-wire two-way serial communication is effected by combining microcomputers set at a master mode. Single-wire two-way serial communication is effected by combining a microcomputer set at a master mode and another microcomputer set at a slave mode.
REFERENCES:
patent: 4622551 (1986-11-01), Kupersmith et al.
patent: 4796256 (1989-01-01), Opderbeck
patent: 4924456 (1990-05-01), Maxwell
patent: 5121382 (1992-06-01), Yang et al.
Microprocessor and Peripheral Handbook, INTEL Corporation 1983.
Bowler Alyssa H.
Donaghue L.
Mitsubishi Denki & Kabushiki Kaisha
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