Specifications

7
11
NC
-
NC
12
GND
I/O
Ground
13
GND
-
Ground
14
GND
-
Ground
15
RF_BT
I/O
BLE RF OUT
16
GND
-
Ground
17
RF_L
I/O
LoRa RF OUT
18
GND
-
Ground
19
GND
-
Ground
20
GDD
-
Ground
21
GPIO1/P0.14
I/O
General purpose I/O (p0.14)
22
USART1_RX
I/O
USART1_RX (General purpose I/O p0.22)
23
USART1_TX
I/O
USART1_TX (General purpose I/O p0.23)
24
GPIO2/P0.17
I/O
General purpose I/O p0.17
25
NC
-
NC
26
NC
-
NC
27
NC
-
NC
28
NC
-
NC
29
NC
-
NC
30
NC
-
NC
31
GND
-
Ground
32
NC
-
NC
33
NC
-
NC
34
NC
-
NC
35
NC
-
NC
36
MCU_NRST
I/O
MCU reset
37
SYS_SWDIO
I/O
SYS_SWDIO
38
SYS_SWDCLK
I/O
SYS_SWDCLK
39
GND
-
Ground
40
3V3_IN
-
Input power
41
3V3_IN
-
Input power
42
GND
-
Ground
Table 2 | Pin Definitions