Specifications

Pin No. Pin Name Pin Direction Pin Usage
1 XL2 Output Connect 32.768 KHz external crystal
2 GND Ground, connected to power reference ground
3 XL1 Input Connect 32.768 KHz external crystal
4 PO28 Input/ Output MCU GPIO
5 PO29 Input/ Output MCU GPIO
6 DVDD Power 1.8V-3.6V DC
7 PO02 Input/ Output MCU GPIO
8 PO03 Input/ Output MCU GPIO
9 PO04 Input/ Output MCU GPIO
10 PO08 Input/ Output MCU GPIO
11 PO09 Input/ Output MCU GPIO
12 PO10 Input/ Output MCU GPIO
13 PO11 Input/ Output MCU GPIO
14 PO14 Input/ Output MCU GPIO
15 PO15 Input/ Output MCU GPIO
16 PO16 Input/ Output MCU GPIO
17 SWD_DAT Input/ Output
System reset (low active) hardware debugging and programming
Flash。
18 SWD_CLK Input Hardware debugging and programming Flash。
19 PO17 Input/ Output MCU GPIO
20 PO18 Input/ Output MCU GPIO
21 PO19 Input/ Output MCU GPIO
22 PO20 Input/ Output MCU GPIO
Chapter 4 Operation Instruction
4.1 Software Architecture
4.1.1 BLE4.2 protocol stack
 Standard BLE protocol stack
 SOC Libray
 Soft Device Manager
4.1.2 Underlying hard drive
 nRF51822 Wireless API
 Protocol API
4.1.3 App-Specific periphereal drivers
 BLE4.2 protocol stack initialization
 Serial command processing