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. 14, 1994
Filed:
Dec. 01, 1992
Chie Ohkubo, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In a pseudo random pattern generation circuit having a normal input operation mode, a boundary scanning operation mode and an inherent pseudo random pattern generation mode, output stage selectors are provided to supply input data as output data without modification in the normal input operation mode. In addition, flipflops are provided to hold the data in the boundary scanning operation mode, so that the data held in the flipflops are not supplied as output signals. Thus, in the normal input operation mode, the data processing speed is increased, and in the boundary scanning operation mode, the data just before the boundary scanning operation mode is maintained without being outputted to an internal circuit of the LSI chip.