The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 05, 1994
Filed:
Apr. 23, 1991
Takahiro Kawai, Hadano, JP;
Masatsugu Shinozaki, Hadano, JP;
Hitoshi Sadamitsu, Hiratsuka, JP;
Tadashi Kyoda, Hadano, JP;
Katsuya Takanashi, Hadano, JP;
Hironori Uchida, Ebina, JP;
Hitachi Ltd., Tokyo, JP;
Hitachi Techno Engineering Co., Ltd., Tokyo, JP;
Abstract
An address bus control system is provided of the type in which a controller including a central processing unit is connected through an address bus and a data bus to hardware modules which control equipment to be controlled. An address space defined by an address bus includes a discrimination space for discriminating the attribute of the hardware module and a function space for allocating and clearing an address space for a function interface of the hardware module. The attribute of a hardware module connected to a connector having a corresponding address is recognized using the discrimination space. The function interface of each hardware module is assigned a space within the function space in accordance with the contents of the discrimination space in concern, or the assigned space is canceled. An address of the function space can be allocated to only a necessary function interface, merely by connecting the hardware module to the connector, allowing to set up hardware modules equal to or larger than the total address space.