Personal computer-based dynamic burn-in system

• US 4,866,714 A
• Filed: 10/15/1987
• Issued: 09/12/1989
• Est. Priority Date: 10/15/1987
• Status: Expired due to Fees

• Current Assignee: Westinghouse Electric Company LLC (Brookfield Asset Management Incorporated)
• Original Assignee: Westinghouse Electric Company LLC (Brookfield Asset Management Incorporated)
• Inventors: Adams, Jerry G., Gibson, Robert P., Mueller, Denis A.
• Primary Examiner(s): ATKINSON, CHARLES
• Application Number:
  US07/108,672
• Time in Patent Office: 698 Days
• Field of Search: 371/16, 371/20, 371/25, 371/28, 324/73 R, 324/73 AT, 324/73 PC, 364/551, 364/579, 364/580
• US Class Current: 714/724
• CPC Class Codes: G06F 11/24 Marginal checking or other specified testing methods not covered by G06F11/26, e.g. race tests

Abstract

An installation for the dynamic burn-in testing of a plurality of digital circuits, and/or microcomputer-controlled circuits, mounted in a burn-in chamber for testing includes a personal computer; power supply for the digital circuits, and a bilateral line of communication between the PC computer and each of the digital circuits; the PC computer interrogating separately, and at will, any of the digital circuits as to their status and capability of changing status while retrieving any indication of a critical testing condition from any digital circuit, to determine a failure-free burn-in time.

Claims

1. An installation for the dynamic burn-in testing of a plurality of digital components and digital component assemblies, comprising:

a personal computer (PC);

a burn-in chamber containing said plurality of digital components and components assemblies under testing;

power supply means connected through said burn-in chamber to said plurality;

means for controlling the operation of said burn-in chamber;

bidirectional digital communication means between said PC computer and said plurality for providing a data highway therebetween;

predetermined reference data characterizing the operation of the respective components and assemblies of components of said plurality being stored for comparison purpose in said PC computer with a related address;

at least one status representative signal being generated by said plurality in relation to a corresponding address for indicating a testing condition;

said bidirectional communication means being controlled by said PC computer to individually and selectively select a status representative signal as an indication of a testing condition at an address relative to one of said digital components and component assemblies in said plurality, and to retrieve the same therethrough;

a corresponding reference data being compared by said PC computer with said selected and retrieved status representative signal for generating an indication of a critical testing condition;

whereby dialoguing through addresses with any of said plurality permits ascertaining with said PC computer the reliability of said digital components and components assemblies through a failure-free burn-in time.

2. The burn-in installation of claim 1 with said digital components being operated in a stand alone slave mode, the PC computer sending through said communication means at least one command signal individually and selectively to each of said digital components to change the status thereof and the PC computer retrieving therefrom through said communication means at least one status representative signal following such command signal.

3. The burn-in installation of claim 1 with said component assemblies each including a local microcomputer and being operated in an expanded slave mode, with said local microcomputer being operative to function with the associated digital components as in real life under said power supply means, the PC computer sending through said communication means individually and selectively to said component assemblies an interrupt signal for interrupting the operation thereof and for opening an interrogation period, with following such interrupt signal the PC computer sending to such component assembly at least one interrogating signal to the local microcomputer and retrieving therefrom a corresponding status representative signal.

4. The installation of claim 1 with said communication means including a common digital data highway and a plurality of local bilateral gating means, said digital data highway extending from the PC computer and going through said burn-in chamber, each of said local bilateral gating means being mounted within said burn-in chamber and associated with a corresponding one of the digital components and component assemblies for providing communication both-ways upon the reception of data from the PC computer and upon the availability of data for the PC computer.

5. The installation of claim 4 with master bilateral gating means being provided between the PC computer and said common digital data highway for providing communication both-ways upon a transmission from the PC computer and upon a reception of data for the PC computer.

6. The installation of claim 5 with interfacing means provided between the PC computer and said master bilateral gating means for translating the PC computer language into data highway language.

7. The installation of claim 6 with said common digital data highway being a dual daisy-line connected to any digital component and digital component assembly of said plurality.