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DSP-1 DRIVER

IP.com Disclosure Number: IPCOM000006491D
Original Publication Date: 1992-Aug-01
Included in the Prior Art Database: 2002-Jan-09
Document File: 1 page(s) / 78K

Publishing Venue

Motorola

Related People

Jeffrey R. Halvorson: AUTHOR [+3]

Abstract

The DSP-1 Driver is designed to efficiently test a whole core group of the Digital Signal Processor (DSP) family, The DSP-1 Driver will be used in production Bum-In and HTOL Testing. It will be interchangeable with current DSP 56116 and 56156 Bum-In Drivers. The Devices Under Test (DUT's) are subjected to ambient temperatures in excess of 125' C, and voltages up to 6.1 Volts DC. The Driver is expected to deliver the voltage, signals and clock to the devices while they are in this environment.

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MOTOROLA INC. Technical Developments Volume 16 August 1992

DSP-1 DRIVER

by Jeffrey R. Halvorson, Frederick D. Causey and John D. Novak

  The DSP-1 Driver is designed to efficiently test a whole core group of the Digital Signal Processor (DSP) family, The DSP-1 Driver will be used in production Bum-In and HTOL Testing. It will be interchangeable with current DSP 56116 and 56156 Bum-In Drivers. The Devices Under Test (DUT's) are subjected to ambient temperatures in excess of 125' C, and voltages up to 6.1 Volts DC. The Driver is expected to deliver the voltage, signals and clock to the devices while they are in this environment.

  In the past, Bum-In and HTOL (High Temperature Over Lie) testing was done by sequential down-loading of a test code. Code was loaded and a signal was checked to verify:

1. Did the code get accepted?
2. Did the code generate a Bus Error?
3. Did the code put a programmable gate into an output low/high state?

  This method fails to truly verify operation of a microprocessor. A part can accept commands without operating upon them. A part can catastrophically fail and not output a Bus Error. And simply monitoring an output for a static high or low signal is not a valid test for functionality of a device. These conditions could all occur and not identify a non-functional part.

  The DSP-1 Driver, as all other drivers, provide spe- cific Bum-In/HTOL voltages, with TTL logic levels. The difference is that the DSP-1 Driver has a known good DSP 56116 device on the Driver. This device is referred to as the "Golden Part:' The Golden Part is provided a regulated and filtered VDD of 5.1 VDC, and connected to memory arrays (8K x 8 EPROMS). All protocol sig- nals such as Clock, RESET and Data O-31, are con- nected to the Golden Part in the same manner as they are to the devices on the Device Under Test (DUT) Boards. Only the "Golden Part" has its Address Bus...