Installation Manual

Chapter 4 Interfaces
8
Interface Description
The table below lists the names and signal descriptions for the individual pins of the E4000's 12-pin connector.
。
PIN#
Signal Name
I/O
说明
1
NC
NC
-
2
VDD
-
3.3V power input
3
GND
-
GND
4
RX
Input
TTL-232 input
5
TX
Output
TTL-232 output
6
USB_D-
Input/outp
ut
USB_D-signal
7
USB_D+
Input/outp
ut
USB_D+signal
8
NG
-
Null
9
Buzz
output
10
LED
Input
11
NG
-
12
nTrig
Input
Trigger key input signal, hold low level for more than 10ms to trigger
reading.