Communication controlling apparatus

Details Communication controlling apparatus Communication controlling apparatus

1994-12-20

1996-06-18

Beausoliel, Jr., Robert W.

G06F 1100

Patent

active

055287549

ABSTRACT:
A communication controlling apparatus comprising a transmission line error detecting circuit 30 which determines whether a transmission line error is detected or not in the data transmitted from its own node without immediately disabling a P-channel MOS transistor 20 or N-channel MOS transistor 21 as output gates when an error is detected in one of the transmission lines (BUS+line 11 or BUS-line 12), a sequence control circuit 31 which informs all the other nodes that the error is detected in its own node, and a selector 27 which determines whether the transmission line error detecting circuit 30 has detected or not the transmission line error in the transmit start (SOF) period and selects a differential comparator. The reliability of communication is improved when an error is detected in one of the transmission lines.

REFERENCES:
patent: 3790769 (1974-02-01), Ziegler
patent: 4527271 (1985-07-01), Hallee
patent: 4930119 (1990-05-01), Kobayashi
patent: 5267251 (1993-11-01), Lenoir
patent: 5351040 (1994-09-01), Matsuura

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