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:
May. 26, 1998
Filed:
Nov. 22, 1995
Akiyoshi Nakamura, Nagano-ken, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A data processing apparatus in which the CPU can have different data bus widths is described. A variable power source is provided to supply a proper voltage to an installed CPU, and a CPU module has a feedback resistor that is connected to feedback terminals of the CPU module. By changing the resistance value of the feedback resistor in each CPU module, a proper output voltage can be provided to the installed CPU. The CPU module is provided with a terminal that generates a module determination signal used for making a determination of a module of the installed CPU module. Expanded RAM is provided with a terminal that generates a memory determination signal used for making a determination as to whether or not a memory is expanded. A memory controller and a bus control section perform a bus control function appropriate to the installed CPU and the installed memory in accordance with the module determination signal and the memory determination signal.