Browse Prior Art Database

Card Functional Sort Testing Signature Method

IP.com Disclosure Number: IPCOM000035834D
Original Publication Date: 1989-Aug-01
Included in the Prior Art Database: 2005-Jan-28
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Chan, GK: AUTHOR [+4]

Abstract

The functional sort testing signature method described in this article provides an effective means of functional sort testing populated cards by utilizing a data compression technique.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Card Functional Sort Testing Signature Method

The functional sort testing signature method described in this article provides an effective means of functional sort testing populated cards by utilizing a data compression technique.

The implementation of this technique requires a PC AT, a processor emulator, the functional self-test acquisition and data compression chip (FSTC), the board under test (BUT), a defect-free board, and the RAS code for the BUT.

The PC AT interfaces with the emulator and the FSTC to control the execution of the RAS code and the subsequent collection of signatures produced by the BUT signal data via the FSTC. The RAS code is run on the defect-free board and signatures are collected on each test net. The signatures are then stored for later comparisons.

The RAS code is run on a BUT and signatures are collected on each of the test nets. These signatures are compared with the defect-free board's signatures. If the signatures match, the BUT passes this test. If the signatures do not match, the BUT fails this test.

The processor emulator can be instructed to START, STOP, or CONTINUE the execution of the RAS code. Therefore, the RAS code can be run in many short segments and signatures can be taken during these time intervals. This enables an iterative means of isolation to the first failing section of code and, therefore, the first failing net.

1

Page 2 of 2

2

[This page contains 3 pictures or other non-text objects]