Teledyne AGPAX User Manual

Active Extender

AGPAX

Hot Swap AGP Bus Extender Board

AGP

User Manual

Revision 1.1

March 9, 1999

Catalyst

Enterprises, Inc.

1439 Torrington Court

San Jose, CA 95120

[phone]

Fax: [phone]

Email [e-mail]

© 1996-1998

TABLE OF CONTENTS

INTRODUCTION 3

INSTALLATION 3

OPERATION 4

ON-OFF 4

POWER-ON RESET 4

CURRENT MEASUREMENT 4

CURRENT LIMIT CIRCUITRY 4

EXTERNAL POWER SUPPLY 5

JUMPER TABLE 6

LEDs 6

SPECIFICAT ION: AGPAX 7

2

INTRODUCTION

This Active Extender board allows HOT SWAPPING or LIVE INSERTION of the Unit-Under-Test into the AGP bus.
The “HOT SWAPPING” feature of this extender eliminates the need for turning the PC Off and On and repeated
rebooting. This feature speeds up rework, characterization and test of Unit-Under-Test in the development phase as
well as production test. The elimination of the repeated power cycling also helps prolong the system life and the hard
disc operation. This Active Extender uses a new CMOS technology for switching the signals On and Off (known as
“Quick Switch”). These switches have a very fast propagation delay, typically about 250 picoseconds, resulting in no
timing degradation between the bus and the Unit-Under-Test. The switches are also bi-directional allowing the entire
address range to be supported for both target and master type operation.

This Active Extender board isolates all signals and voltages to the Unit-Under-Test, when the On-Off switch is in the
Off position. All voltages are ramped down and ramped up during the power down and power up in order to eliminate
any spikes. During the power down the signals to the bus become isolated as soon as the VCC3 supply, reaches down
to +2.7V. During the power up the signals stay isolated until this voltage is at least +2.8V.

The AGPAX extender board allows for voltage margin testing of the UUT by allowing external power supplies to
replace the system power supplies as inputs to the Unit-Under-Test.

An on-board current-to-voltage converters allow measurement of the current drawn by the UUT at any time, using just
a voltmeter at the appropriate test points.

INSTALLATION

To install the Active Extender board, make sure to turn the PC power off. Insert the Active Extender in any available
AGP slot and secure it’s bracket to the main chassis. You are now ready to use your new extender board.

NOTE: If you are planning to use an external I/O signal to control the board, the On-Off switch must be in the Off
position.

3