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:
Feb. 15, 2000
Filed:
Oct. 06, 1997
William A Hohl, Pflugerville, TX (US);
Joseph C Circello, Phoenix, AZ (US);
Motorola Inc., Schaumburg, IL (US);
Abstract
A central processing unit (2) and a debug module (10) execute concurrent operations without requiring a data processor (3) to operate in a special debug mode. The use of a bus (25) to communicate data, address, and control information between a core (9) and debug module (10) allows debug module (10) to have access the same internal registers and memory locations as central processing unit (2). While debug module (10) and central processing unte (2) both have the ability to access the same internal registers and memory locations, central processing unit (2) may not modify a value stored in a plurality of breakpoint registers (50) when an Inhibit Processor Writes to Debug Registers (IPW) bit in a CSR (FIG. 8) of a plurality of control registers (40) is set. The IPW bit may only be modified by a command provided by an external development system (7).