User's Manual

2. Pins and definitions
Pin definition
Foot
posi
tion
name
type
desc
ribe
1
GND
GND
Ground
2
Pa5
Dio
Data_UART_TX
3
PA4
Dio
Data_UART_RX
4
PA6
Dio
At_Mode
5
PA7
Dio
Wakeup
6
PA0
Dio
GPIO
7
NC
/
8
PA3
Dio
HCI_UART_TX (burning port)
9
Pa2
Dio
HCI_UART_RX (burning port)
10
VBAT
AI
Positive supply input (1.8~4.3V)
11
PC7
Dio
GPIO
12
PD4
Dio
GPIO
13
PD5
Dio
GPIO
14
PD6
Dio
GPIO
15
Pd7
Dio
GPIO
16
NC
/
17
NC
/
18
NC
/
19
RESET
AI
Global reset (Low active)
20
GND
GND
Ground