11
Chapter 4 Interfaces
Host Interface Connector
The following table lists the pin functions of the 12-pin host interface connector on the EM1365-LD.
PIN#
Signal Name
I/O
Function
1
NC
-
Not connected.
2
VDD
-
3.3V
power supply.
3
GND
-
Power-supply ground.
4
RX
I
TTL level 232 receive data.
5
TX
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
PWRDWN
O
Low Power State signal output: Active high indicates that the
engine is in low power state.
9
Buzz
O
Beeper output. For the information of beeper driver circuit, see the
Beeper
section in this chapter.
10
LED
O
Good Read LED output. For the information of LED driver circuit,
see the
Good Read LED
section.
11
Wake
I
Same as the nTrig pin (PIN 12).
12
nTrig
I
Trigger signal input: Driving this pin low for at least 10ms causes
the engine to start a scan and decode session.
