Method and apparatus for data transfer

Details Method and apparatus for data transfer Method and apparatus for data transfer

1988-08-11

1991-02-05

Weldon, Ulysses

Communications: electrical

Continuously variable indicating

With meter reading

3408252, 34082551, 370 856, H04Q 300, H04J 302

Patent

active

049909070

ABSTRACT:
A bus master and a plurality of bus slaves are connected through a data bus and a control bus, and data transfer of hand shake system is performed. In the control bus, at least data strobe signal from the bus master to the bus slave and data confirmation signal from the bus slave to the bus master are transmitted. The data strobe signal from the bus master is one inputted to a bus strobe control circuit. The data confirmation signal from the bus slave is also inputted to the bus strobe control circuit, and the control circuit supervises level of the data confirmation signal being asserted and confirms negation, and then asserts the data strobe signal to the bus slave. Thereafter, a next data transfer is started.

REFERENCES:
patent: 3988716 (1976-10-01), Fletcher et al.
patent: 4408300 (1983-10-01), Shima
patent: 4486750 (1984-12-01), Aoki
patent: 4621360 (1986-11-01), Inoue
patent: 4831358 (1989-05-01), Ferrio et al.

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