Datasheet

National Semiconductor Page 2 www.national.com
Table of Contents
1.0 SPIO-4 System Overview ......................................................................................................................3
1.0 SPIO-4 System Overview ......................................................................................................................3
1.1 SPIO-4 System Features................................................................................................................3
1.2 Packing List ....................................................................................................................................3
1.3 Board Layout Overview ..................................................................................................................4
1.4 Component Description..................................................................................................................5
1.5 SPIO-4 Board Test Points ..............................................................................................................5
2 System Functionality ..............................................................................................................................6
2.1 System Block Diagram ...................................................................................................................6
2.2 General System Overview..............................................................................................................6
2.3 Automatic Device Detection & Configuration .................................................................................7
2.4 LED Indicators ................................................................................................................................7
2.5 DUT Interface (GPSI-16/32)...........................................................................................................7
2.5.1 Level Shifters...........................................................................................................................9
2.6 Auxiliary Interface .........................................................................................................................12
2.7 Computer Interface.......................................................................................................................12
2.8 Memory.........................................................................................................................................12
2.9 Power Requirements....................................................................................................................12
3 SPIO-4 Bill of Materials ........................................................................................................................13
4 SPIO-4 Schematics ..............................................................................................................................14
Table 1 - Main component reference designators ........................................................................................5
Table 2 - Test Points.....................................................................................................................................5
Table 3 - LED Behavior.................................................................................................................................7
Table 4 GPSI-32 Signals.............................................................................................................................12
Figure 1 - SPIO-4 Board Layout – Component Side ....................................................................................4
Figure 2 - SPIO-4 System Block Diagram ....................................................................................................6
Figure 3 - GPSI 16 DUT to SPIO4 Mating ....................................................................................................8
Figure 4 - GPSI 32 DUT to SPIO4 Mating ....................................................................................................9