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:
Jun. 04, 1991
Filed:
Jun. 21, 1989
Nobuhisa Watanabe, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A microcomputer universal package has testing terminals and switching circuitry for selecting first and second operations. In the first operation, as an evaluator type, a test device is connected to the testing terminals of the package. In the second operation, as a piggyback type, a rewritable ROM (EPROM) is connected to the testing terminals of the package. The testing terminals are automatically switched for the particular operation by the switching circuitry. Accordingly, the same device can be used as the evaluator type chip and the piggyback-type chip, which reduces the time and the cost of developing the program. In addition, since the piggyback-type chip, the evaluator-type chip, and a mask-type ROM chip can be constructed with the same pin arrangement, the program can be evaluated by the evaluator-type chip in the mask-type ROM mounting board that becomes the final product without requiring an interface board.