ST2883 Series Operation Manual Chapter 9 Handler interface
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Chapter 9 Handler interface
9.1 Basic information
The handler interface employs a 9-pin DB connector. Pin sequence is as follow.
The signal definitions for each pin are described as follows:
Note: The / (back slash) in the signal name means that the signal is asserted when low level
PIN
EXGND: Common for external voltage source EXV.
When ST2883 series uses the internal voltage as the power supply for handler interface, ST2883
series’ circuit common will be connected to EXTEND.
PIN
/EOC: End of conversion.
/EOC signal is asserted when the A/D conversion is completed and ST2883 series is ready for
the next DUT to be connected to the test terminals. The measurement data, however, is not valid
until BUSY is asserted to low.
PIN
BUSY: ST2883 series is in the test state. When calculation, comparison and display are all completed,
this signal is asserted to low.
PIN
/PASS: Pass signal output.
PIN
/FAIL: Fail signal output.
PIN
EXV: External DC voltage
DC voltage supply pins for DC isolated collector outputs, /EOC, /START, /STOP, /PASS, /FAIL,
/EOM. The setting of internal jumpers must be changed when using the internal voltage supply.
PIN
/START: External trigger signal.
ST2883 series is triggered bon the rising edge of a pulse applied to this pin when the trigger
mode is set to EXT mode.
PIN
/STOP: External stop signal
Test is interrupted on the rising edge of a pulse applied to this pin.
PIN
VCC: Internal voltage source supply (+5V)
Internal source is not recommended for user to use. Make sure the current is lower than 0.1 A
and keep the signal line be away form interference source when use.
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