User's Manual

5
27
VCC
2.5V-3.5V DC power supply
VCC
28
RF OUT
Reserved for external on-board printed
antenna.
NC
29
PA4
GPIO / ADC0
C3
30
PA5
GPIO / ADC1
C1
31
PC0
Programming and debug interface
F3
32
SWCLK
Programming and debug interface
F5
33
PC2/UART_RX
Programming and debug interface
A6
34
PC3/UART_TX
Programming and debug interface
B6
35
SWDIO
Programming and debug interface
G5
36
NRST
Active Low Chip Reset
G1
37
VCC
2.5V-3.6V DC power supply
VCC
38
GND
GND
GND
39
GND
GND
GND
40
GND
GND
GND
41
ISP
Pull low to program FW
ISP