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:
Sep. 17, 2002
Filed:
Apr. 12, 2001
Michael T. Moore, Santa Clara, CA (US);
Cypress Semiconductor Corporation, San Jose, CA (US);
Abstract
An I/O cell of a programmable logic device comprising a register, a first multiplexer, a second multiplexer, and a third multiplexer. The first multiplexer may be configured to present one of a plurality of signals to a data input of the register in response to a control signal. The second multiplexer may be configured to select either an output signal from the register or an external input signal in response to the control signal. The third multiplexer may be configured to select one of a number of inputs for presentation as an output signal of the I/O cell in response to the control signal. The register may be configured as an internal register of the programmable logic device when the I/O cell is configured to receive a combinatorial input signal and/or present a combinatorial output signal.