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:
Jan. 28, 1992
Filed:
Oct. 30, 1987
John J Vaglica, Austin, TX (US);
Jay A Hartvigsen, Austin, TX (US);
Rand L Gray, Hillsboro, OR (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A data processor with development support features includes an alternate mode of operation in which instructions are received by means of an externally-controlled path. The connections used by the externally-controlled path are not shared by any system resources accessible to the data processor in the normal mode of operation, but are used by other development support features in the normal mode. In a preferred embodiment, an integrated circuit microcomputer includes such a data processor as its CPU. The CPU has access to on-chip peripherals and memory, in addition to off-chip peripherals and memory, in both the normal and alternate modes of operation, by means of a parallel bus which it operates as a bus master. In the alternate mode, the CPU receives instructions by means of a serial bus on which the CPU is a slave device.