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Host Interface Connector
The following table lists the pin functions of the 12-pin host interface connector on the EM1300-LD.
PIN
Signal Name
1
NC
2
VCC
3
GND
4
RXD
5
TXD
6
USB_D-
7
USB_D+
8
PWRDWN
9
BEEP
10
DLED
11
WAKE
12
TRIG
11
Chapter 4 Interfaces
I/O
-
Not connected.
P
DC 3.3 ± 0.3V
P
Ground
I
RS232 Receiving, TTL
O
RS233 Transmission, TTL
I/O
USB_D- differential data signal.
I/O
USB_D+ differential data signal.
Low Power State signal output: Active high indicates that the
O
engine is in low power state.
O
Beeper output. Need an external current amplifier.
O
Decode LED. Need an external current amplifier.
I
Same as the nTrig pin (PIN 12).
Trigger signal input: Driving this pin low for at least 10ms causes
I
the engine to start a scan and decode session.
Function
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