10
Chapter 4 Interfaces
Host Interface Connector
The following table lists the pin functions of the 12-pin host interface connector on the EM3080-W.
PIN#
Signal
I/O
Function
1
-
-
Not connected.
2
VDD
-
3.3V
power supply.
3
GND
-
Power-supply ground.
4
RXD
I
TTL level 232 receive data.
5
TXD
O
TTL level 232 transmit data.
6
USB_D-
I/O
USB D- differential data signal
7
USB_D+
I/O
USB D+ differential data signal
8
-
-
Not connected.
9
BUZZ
O
Beeper output.
10
VIB
O
LED output: When using this signal, a driver circuit is needed to
drive an external LED.
11
RESET
I
Reset signal input: Active low. Driving this pin low for 100us resets
the engine.
12
TRIG
I
Trigger signal input: Driving this pin low for 10ms causes the engine
to start a scan and decode session.
