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Host Interface Connector
The following table lists the pin functions of the 12-pin host interface connector.
EM3080 (TTL-232 version):
PIN#
Signal Name
1
NC
2
VDD
3
GND
4
RX
5
TX
6
NC
7
NC
8
NC
9
Buzz
10
NC
11
NC
12
nTrig
Chapter 4 Interfaces
I/O
-
Not connected.
-
3.3V power supply.
-
Power-supply ground.
Input
TTL-232
receiving.
Output
TTL-232
transmission.
-
Not connected.
-
Not connected.
-
Not connected.
Beeper output. For the information of beeper driver circuit, see the
Output
"Beeper" section in this chapter.
-
Not connected.
-
Not connected.
Trigger signal input: Driving this pin low for 10ms causes the
Input
EM3080 to start a scan and decode session.
Function
10
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