Agilent Technologies 93000 SOC Series Training Manual page 333

11-4 The Continuity Test Function
Agilent 93000 SOC Series User Training Part 1, October 2004
Debugging a continuity test
Follow the steps given below to debug the continuity test:
1 Ground all the device pins including the power pins.
2 Force between 100 uA and 200 uA of current through the PMU.
3 The diode voltage drop will be from 450 mV to 900 mV depending
upon the device technology.
4 If the ESD has two diodes (like the example on the slide) then you
can also perform the positive and negative polarity tests.
a Force positive current (+100 uA to +200 uA) to forward bias the
diode that is connected to VDD.
b Force negative current (-100uA to -200uA) to forward bias the
diode that is connected to GND or VSS.
5 A voltage clamp (~ 2.5V) should be used to limit the voltage
produced by the open pins.
6 Set the upper limit to 900 mV to detect an open diode and set the
lower limit to 400 mV to detect a short.
7 The continuity test will fail if the tester sees a voltage drop that is
not within the limits or if the current reaches its clamp value.
Standard Test Functions
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