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Trigger
Driving the
nTrig
pin (PIN 12) on the host interface connector low causes the EM3080 to start a scan and
decode session. If barcode is decoded, the EM3080 waits for the voltage at the nTrig pin to turn high (or
the trigger to be released) after sending the data to the Host. If the trigger is released during a scan
attempt, the EM3080 stops decoding.
Next decode session does not happen until the EM3080 receives active trigger signal (driving the nTrig
pin low) again.
As a decode session involves image capture, barcode decoding and other steps, it is suggested that the
minimum interval between two triggers should exceed 50ms.
The following trigger circuit is provided for reference.
S1
B3F-4000
2
3
1
4
VDD
R15
10K
L1
CBW1608/60R
C3
100pF
nTrig
C4
100pF
14
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