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. 31, 1994
Filed:
Jun. 14, 1991
Philip A Bourekas, San Jose, CA (US);
Yeshayahu Mor, Cupertino, CA (US);
Scott Revak, Castro Valley, CA (US);
Integrated Device Technology, Inc., Santa Clara, CA (US);
Abstract
A structure and a method are provided to bring internal signals of an integrated circuit to the external pins for monitoring purpose. In one embodiment, the signals on an internal bus between an on-chip cache and a CPU in a microprocessor are provided on the microprocessor's pins for a bidirectional data/address bus, when the bidirectional data/address bus is not used for data/address bus transactions with the main memory or the peripheral input/output devices. In this embodiment, reserved pins are used to selectively enable the address/data bus for bringing out the signals of the on-chip bus.