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:
Apr. 25, 2006
Filed:
Nov. 14, 2002
Nicholas James Rally, San Mateo, CA (US);
Alan Louis Herrmann, Sunnyvale, CA (US);
Nicholas James Rally, San Mateo, CA (US);
Alan Louis Herrmann, Sunnyvale, CA (US);
Altera Corporation, San Jose, CA (US);
Abstract
User logic within a PLD is debugged by way of the hub. The PLD includes a serial interface (such as a JTAG port) that communicates with a host computer. Any number of client modules are within the PLD and provide instrumentation for the PLD. A module is a logic analyzer, fault injector, system debugger, etc. Each client module has connections with the user logic that allows the instrumentation to work with the user logic. The hub communicates with each client module over a hub/node signal interface and communicates with the serial interface over a user signal interface. The hub routes instructions and data from the host computer to a client module (and vice-versa) via the serial interface and uses a selection identifier to uniquely identify a module. The hub functions as a multiplexor, allowing any number of client modules to communicate externally though the serial interface as if each node were the only node interacting with user logic.