Method and device for the transmission of data on a bus

Details Method and device for the transmission of data on a bus Method and device for the transmission of data on a bus

1995-12-18

1998-01-20

Harvey, Jack B.

Boots, shoes, and leggings

395285, 395550, 395430, 395892, 364200, 370 54, G06F 1342

Patent

active

057108900

ABSTRACT:
With a two-wire bus, the method is to be used in a system which comprises only a master and a slave. Before generating a "start" signal of the customary type, the master requesting the dialog pulls the clock wire to zero for a period which is limited but long enough (2-3), for example more than 1 mS, and also pulls the data wire to zero. The slave responds by pulling the clock wire to zero (5) for a period of time of the same order of magnitude, after which the master resets the data wire (6) and initiates a customary start procedure (7). In the case where the slave requests the dialog, only the clock wire is pulled to zero during the first phase.

REFERENCES:
patent: 3720790 (1973-03-01), Watson et al.
patent: 3922486 (1975-11-01), DeJean
patent: 4689740 (1987-08-01), Moelands et al.
patent: 5488711 (1996-01-01), Hewitt et al.

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