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Tester Synchronization to Unit Under Test Functional Self-Test Code

IP.com Disclosure Number: IPCOM000104174D
Original Publication Date: 1993-Mar-01
Included in the Prior Art Database: 2005-Mar-18
Document File: 2 page(s) / 68K

Publishing Venue

IBM

Related People

Bowen, SO: AUTHOR [+4]

Abstract

Disclosed is a software unit under test (UUT) self-stimulus (test) structure which will provide the synchronization breakpoints for the inherent host test system controlling the overall test sequencing. The major components of the test system are its software and hardware subsystems.

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This is the abbreviated version, containing approximately 52% of the total text.

Tester Synchronization to Unit Under Test Functional Self-Test Code

      Disclosed is a software unit under test (UUT) self-stimulus
(test) structure which will provide the synchronization breakpoints
for the inherent host test system controlling the overall test
sequencing.  The major components of the test system are its software
and hardware subsystems.

      The software subsystem is referred to as the Test Control
System (TCS).  The TCS runs on top of the IBM OS/2* Version 1.3
operating system.  The major function of TCS is to initialize the
test system and control the application sequencing of the hardware
stimulus, measurement and UUT interface devices.

      The hardware stimulus subsystem consists of four programmable
power supplies and an arbitrary waveform generator.  The hardware
measurement subsystem consists of a digital multimeter (DMM) and its
associated multiplexer, a digital storage oscilloscope (DSO) and an
interval timer counter (ITC), both with their associated 50 ohm
multiplexers, and, finally, a digital logic analyzer unit (LA),
usually configured in "state" measurement mode.  The UUT interface
subsystem consists of special custom hardware adapters for each I/O
function of the UUT.  The I/O devices currently supported are
keyboard, mouse, serial port, parallel port, diskette port, SCSI
port, video, memory and MICRO CHANNEL*.  The system has sufficient
flexibility to develop any new I/O device adapters as required.
Also, each UUT requires a unique holding fixture adapter which
provides physical interconnection between the test system and the
UUT.

      As stated above, this disclosure focuses on the software
structure of the UUT self stimulus (test) code.  This code will be
referred to as the functional self test (FST) code.  The primary UUT
interface is the parallel port.  All communications between the UUT
and the tester are via the parallel port.  Tester...