Module Pin Assignment: Application Circuit
Pin NO.
Pin Name
Remark
1.
RF IN
Connect to External Active Antenna. While external antenna is used.
2.
GND
Ground.
3.
GND
Ground.
4.
GND
Ground.
5.
VBAT
This is the battery backup input that powers the SRAM and RTC, The
battery voltage should be between 2.0v and 5.0v.
6.
GND
Ground.
7.
BOOTSEL
Set this pin to high for programming flash.
8.
GND
Ground.
9.
GND
Ground.
10.
GND
Ground.
11.
VCC
This is the main DC supply for a 3.3V +- 5% DC input power module board.
12.
GND
Ground.
13.
RESET
This input is low active.
14.
GND
Ground.
15.
GND
Ground.
16.
ECLK
Pull-up via 4.7K to 10K.
17.
GND
Ground.
18.
GPIO
User can use this I/O pin for special function.For example, on/off LED.
19.
GND
Ground.
20.
TIMEMARK
One pulse per second.