Bus communicating device

Abstract

Abstract PURPOSE:To cause the other device to use a bus until a data return from a bus slave is executed by causing a bus master to release the bus without waiting for the data return from the bus slave when a read request from the bus master is executed. CONSTITUTION:In the period of L1-L2, for example, a bus master Ma sends a data request to a bus slave Sa, the using right of the bus is released without waiting for the response of the bus slave Sa, thereby, the data request to a bus slave Sb can be continuously sent from another bus master Mb in the period of L3-L4, and the using efficiency of the bus is improved. Even when plural bus masters Ma and Mb are made into a response waiting condition from the bus slaves Sa and Sb, by an identification number, the bus master can distinguish the bus slave whose response is the data which it requests itself. Thus, the responses from the bus slaves Sa and Sb returned in periods L5-L6 and L7-L8 can be correctly fetched.

Inventors

• 👤 Shigehiro Asano
• 👤 滋博 浅野

Bibliographic Details