User's Manual

6 / 13
3. Pin Descriptions
3.1 Pin-out
3.2 Pin Descriptions
Pin
No.
Function
Remark
RFOUT
1
Support external antenna
GND
2
GND pin
Power GND
SWDIO
3
Support SWD
SWDCLK
4
Support SWD
P21
5
Reset
Reset
P18
6
General input/output
P16
7
General input/output
P12
8
General input/output
VCC
9
1.7-3.6V
Connect a capacitor
GND
10
GND pin
Power GND
P05
11
General input/output
P04
12
General input/output
XL1
13
Connect external 32MHz
crystal
EH-ES201 Datasheet