MT84G User’s Manual V0.1
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3. Reading Mode
3.1 Trigger Mode
In trigger mode, MT84G starts scanning barcode when trigger pin = low. If
trigger stays low within LED timeout, the scanning continues. When LED
timeout expires or a barcode is scanned, the scanning stops. To restart
scanning, the host must reset trigger level first and then pull trigger low again.
Trigger Mode*
3.1.1 Trigger Condition
When trigger condition = level, the trigger pin must always stay low during a
scanning operation. The scanning will not stop until a barcode is scanned or
LED timeout expires. When trigger condition = pulse, MT84G starts scanning
whenever a low level pulse at trigger pin is detected, and will continue
scanning until a barcode is scanned or LED timeout expires.
Level*
Pulse
3.1.2 LED Timeout
LED timeout is the maximum scanning duration. When LED timeout expires,
the scanning operation stops automatically. The configurable range is from 100
to 25500ms; default is 5000ms.
