13
Control Interfaces
Reset
Driving the RESET pin (PIN 11) on the host interface connector low for 100
μs-500μs and then having the
signal back to high or idle high level resets the EM3090.
The minimum interval between reset operations must exceed 2 seconds.
Trigger
Driving the TRIG pin (PIN 12) on the host interface connector low for a specified time period causes the
EM3090 to start a scan and decode session. The time period varies from one scan mode to another.
Anti-shake mechanism is used in level trigger mode. For this mode, a trigger begins when the signal from
the TRIG pin remains low for at least 10ms.
For those scan modes with a timeout mechanism, the trigger automatically deactivates when the timeout
expires. After a trigger ends, the engine gets ready for next trigger only if the signal from the TRIG pin
stays high for at least 10ms.
