LOW POWER CONSUMPTION BUS STRUCTURE AND METHOD FOR CONTROLLING THE SAME AND SYSTEM FOR SYNTHESIZING LOW POWER CONSUMPTION BUS STRUCTURE AND METHOD THEREFOR AND PORTABLE INFORMATION EQUIPMENT

摘要

PROBLEM TO BE SOLVED: To provide a low power consumption bus structure in which low power consumption and the high speed of data transfer can be realized. SOLUTION: Plural functioning blocks 1, 3, 5 and 7 arranged on an LSI chip are connected, and a bus 9 to be used for data transfer between each functioning block is divided into plural sub-sections 9a, 9b and 9c, and the set of functioning blocks whose data transferring speed is high, for example, the functioning blocks 1 and 7 are connected with the same sub-section 9b. Moreover, connecting means 29 and 31 for arbitrarily electrically connecting or disconnecting the divided sub-sections are provided between each divided sub-section. Then, at the time of operating data transfer between the functioning blocks whose data transfer frequency is high, the sub-sections with which they are connected are electrically disconnected from the other sub-section by the connecting means.