Note

Application Note 3
Contents
1 Introduction.........................................................................................................................7
1.1 Terminology...........................................................................................................8
1.2 Reference Documents...........................................................................................8
2 Theory ................................................................................................................................9
3 Powered Testing With Digital Vectors (ICT).....................................................................11
3.1 Using Voltage Identifier (VID) Signals.................................................................11
3.2 Using Control Signals..........................................................................................11
3.3 Using Test Head Loads.......................................................................................12
4 Un-Powered Testing (MDA) .............................................................................................15
5 Board Design Impact on Test Results..............................................................................17
5.1 How to Test .........................................................................................................17
5.2 U1 Pin for Powered Testing ................................................................................17
6 Related Specifications......................................................................................................19
7 Ball Usage........................................................................................................................21