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:
Jul. 16, 1991
Filed:
Dec. 21, 1989
Ajay J Padgaonkar, Phoenix, AZ (US);
Other;
Abstract
A semiconductor integrated circuit device has an on-chip processor and at least one on-chip digital register for storing plural bits therein. The bit contents of the register are written, selectively transformed, and read out of the register during processing of data by the processor and related circuitry. Peripheral instructions such as those from an interrupt source may contend with instructions from the processor for setting and clearing one or more bits in the register. To permit setting and clearing a unique bit in the register without affecting other bits in the register or the capability of the contending source to perform its instructions on one or more of these other bits, three separate addresses are provided for bit set, bit clear, and direct write of the register.