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Page 16

Electrical Interface

Input signals

When the Trigger line is pull low for 10 ms, the Engine starts a read. The Engine keeps reading until a

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

make another read.

Here is a schematic from the evaluation board, EVK3000&1300. The signal can connect to external device's

output port.

Trigger Input

2 3

1 4

SW-PB

DGND

BOOT

DV 3.3V

DGND

TXD

RXD

RTS

CTS

BUZ

DLED

TR IG

GND

DGND

A Sample Schematic of Trigger Input Circuit

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Newland EM1300 Handbuch Seite 25