Data-transfer controlling system

Details Data-transfer controlling system Data-transfer controlling system

H - Electricity

04

L

340/86

H04L 5/14 (2006.01) G06F 13/37 (2006.01)

Patent

CA 1147421

A DATA-TRANSFER CONTROLLING SYSTEM ABSTRACT OF THE DISCLOSURE A data-transfer controlling system comprising a bus- -control unit (3) connected to a common bus for controlling data transfer through the bus and a plurality of trans- mitter/receiver units (2-i) for transferring data through the common bus to each other. The bus is comprised of a transfer-request signal line (5) connected to each of the transmitter/receiver units (2-i), one or two permission- -signal lines [(6) or (6-1, 6-2)], for permitting the transmitter/receiver unit, which has been generating the transfer-request signal, to transfer data, an aknowledge- -signal line (7) and a tarnsfer-end signal line (9). The bus does not include a busy-interlock signal line which was included in the prior art. The transmitter/reciever unit which has received the permission singal (5) begins to transfer data when both of the permission signal and the transfer-end signal are terminated.

353721

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