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Page 21

Electrical Interface

Input signals

Trigger Input

When the Trigger line is pull low for20 ms, the Engine starts a read. The Engine keeps reading until

a successful reading or the line is high. After a successful reading, the line must go high in order to

make another reading.

Sample Input schematics

Here is a schematic from the evaluation board, EVK3000&1300. Those two signals can connect to

external device’s output port.

Output Signals

Here are the descriptions of the output signals, beeper and LED. They can be used to detect the status

of the scanning and the state of the Engine.

Reset Input

The Engine restarts itself after the Reset line is pull low for 100μs and back to high. The LED

Pin will go low. The LED Pin will stay low until the Reset Pin is released and power is applied to

EM3000. After the initialization, if send-beep option is enabled, the Engine will send power on

beeper signal.

Beeper Output

Table below is the definitions of the beeper outputs:

Beep Pattern Definitions

Low-higher-higher-higher Power ON completed

1 beep Successful reading of an ordinary barcode

2 beeps Successful reading of an programming barcode

3 short low-2 high Reading failure

1 long low Unknown Character, Virtual Keypad (USB connection)

BUZ

TXD

TR IG

/RESET

LED

VCC_3.3V

RXD

10R

BUTTON

12 Pins Flex Cable

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Newland EM3000 Spezifikationen Seite 30