Semiconductor integrated circuit device which executes data transfer between a plurality of devices connected over network, and data transfer method

Abstract

A semiconductor integrated circuit device includes a first semiconductor device and a second semiconductor device, first and second buffer circuits, a data bus, and a control circuit. The semiconductor integrated circuit device executes data transmission / reception between the first and second semiconductor devices. The first and second buffer circuits store data. The data bus transmits the data between the first and second buffer circuits. The first semiconductor device reads out the transfer data into the first buffer circuit. The control circuit transfers the transfer data, which is stored in the first buffer circuit, to the second buffer circuit via the data bus. The control circuit acquires a right of use of the data bus after the first semiconductor device writes the transfer data into the first buffer circuit, and disclaims the right of use of the data bus after the transfer data is transferred to the second buffer circuit.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application is based upon and claims the benefit of priority from prior Japanese Patent Application No. 2005-136150, filed May 9, 2005, the entire contents of which are incorporated herein by reference. BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates generally to a semiconductor integrated circuit device and a data transfer method, and relates to, for instance, a data transfer scheme of data transfer between a plurality of devices connected over a network. [0004] 2. Description of the Related Art [0005] In recent years, the amount of data handled in computers has been increasing with great rapidity. Accordingly, how to increase a data transfer speed is very important from the standpoint of enhancement in processing speed of computers. [0006] In the prior art, Jpn. Pat. Appln. KOKAI Publication No. 2001-209626 and Jpn. Pat. Appln. KOKAI Publication No. H10-116244, for instance, discl...

AI Technical Summary

Benefits of technology

[0015] causing a control circuit to confirm completion of the read-out of the transfer data into the first buffer circuit, and to acquire a right of use of the data bus;

[0016] causing the control circuit to transfer the tr

Problems solved by technology

In these prior-art data transfer methods, however, the data transfer speed is not sufficient.

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