Table of Contents
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The following table lists the pin functions of the 12-pin host interface connector on the EM3090. Refer to
the "Cable Connection" section in this chapter for the location of Pin 1.
PIN#
Signal Name
1
VCC
2
VCC
3
GND
4
RX
5
TX
6
D-
7
D+
8
GND
9
BUZ
10
LED
11
RESET
12
TRIG
9
Chapter 4 Interfaces
I/O
-
Power supply.
-
Power supply.
-
Power-supply ground.
Input
TTL level 232 receive data.
Output
TTL level 232 transmit data.
Input/Output
USB D- differential data signal
Input/Output
USB D+ differential data signal
-
Power-supply ground.
Beeper output. For the information of external beeper driver
Output
circuit, see the Control Interfaces section.
Good Read LED output. For the information of external LED
Output
driver circuit, see the Control Interfaces section.
Reset signal input: Driving this pin low for at least
Input
100μs-500μs resets the EM3090.
Trigger signal input: Driving this pin low for at least 10ms
Input
causes the EM3090 to start a scan and decode session.
Function
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