Data Sheet

© 2008-2020 Seeed Technology Co., Ltd. All rights reserved. www.seeedstudio.com 6 / 18
Number
Name
Type
Description
1
VCC
-
Supply voltage for the module
2
GND
-
Ground
3
PA13
I
SWDIO of SWIM for program download
4
PA14
I/O
SWCLK of SWIM for program download
5
PB15
I/O
SCL of I2C2 from MCU
6
PA15
I/O
SDA of I2C2 from MCU
7
PB4
I/O
MCU GPIO
8
PB3
I/O
MCU GPIO
9
PB7
I/O
UART1_RX from MCU
10
PB6
I/O
UART1_TX from MCU
11
PB5
I/O
MCU GPIO
12
PC1
I/O
MCU GPIO ；LPUART1_TX from MCU
13
PC0
I/O
MCU GPIO ；LPUART1_RX from MCU
14
GND
-
Ground
15
RFIO
I/O
RF input/output
16
GND
-
Ground
17
RST
I/O
Reset trigger input for MCU
18
PA3
I/O
MCU GPIO；USART2_RX from MCU
19
PA2
I/O
MCU GPIO；USART2_TX from MCU
20
PB10
I/O
MCU GPIO
21
PA9
I/O
MCU GPIO
22
GND
-
Ground
23
PA0
I/O
MCU GPIO
24
PB13
I/O
SPI2_SCK from MCU; Boot pin(Active low)
25
PB9
I/O
SPI2_NSS from MCU
26
PB14
I/O
SPI2_MISO from MCU
27
PA10
I/O
SPI2_MOSI from MCU
28
PB0
I/O
Unavailable；Suspended treatment
3 Electrical characteristics
3.1 Extreme working conditions
Reaching or exceeding the maximum ratings listed in the table below can cause equipment damage.
Table 2 Absolute Maximum Ratings
Item
Description
min
max
unit