Jinan USR IOT Technology Limited 4 / 9
1.3.
Pin Definition
PIN
Name
Definition
1
GND
Power Ground
2
GPIO
GPIO
3
GPIO
GPIO
4
nReset
Reset module, take effect in low level
5
SOP2
Pull up when upgrading the firmware version by serial port
6
SOP1
Pin floating
7
SOP0
Pin floating
8
ANA DC-DC
RF power output pin, pin floating
9
NC
Not available
10
NC
Not available
11
GND
Power Ground
12
GND
Power Ground
13
VBT_CC
Power input pin, connect to 3.3V
14
VDD_ANA2
Power input pin, connect to 3.3V
15
GPIO
GPIO
16
NC
Not available
17
GND
Power Ground
18
GPIO
GPIO
19
UART0_TX
Serial port 0 TX Pin
20
UART0_RX
Serial port 0 RX Pin
21
nReload
Take effect in low level.Keep low level 1-3s to enter simplelink
mode,over 3s to restore factory settings