Chengdu Ebyte Electronic Technology Co., Ltd.
E32-900MBL-1 User Manual
Copyright © 2012–20 21 , Chengdu Ebyte Electronic Technology Co., Ltd.
4
1. 3 Support list
Pin number
Definition
Function Description
1
VCC
Power supply pin: it needs to be short-circuiting
with pin 2 to supply power to the module
2
3.3V
3.3V electric pin
3
3.3V
3.3V power pin
4
VIO
MCU power supply pin: it needs to be
short-circuiting with pin 3
5
GND
Backplane reference ground
6
REST
MCU external reset pin
7
S WIM
SWIM pin of MCU
8
VIO
MCU power supply pin
9
PC0
Module reset pin
1 0
PB7
Module MISO pin
1 1
PB6
Module MOSI pin
1 2
PB5
Module SCLK pin
1 3
PB4
Module NSS pin
1 4
TXD
MCU serial port TXD
1 5
RXD
MCU serial port RXD
1 6
M1
Module mode switching pin (see module product
manual for details)
1 7
GND
Backplane reference ground
1 8
M 0
Module mode switching pin (see module product
manual for details)
1 9
GND
Backplane reference ground
