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Copyright © Murata Manufacturing Co., Ltd. All rights reserved. 22 March 2018
Module Pin Assignment
Pin
No. Terminal Name Type Connection to
IC terminal Description
1PWR_EN I BD9141MUV_EN Power enable/disable
1:Enable
0:Disable
2USART1_TX I/O STM32F401_PA9 GPIO Mode:PA9
USART1_TX
3USART1_RX I/O STM32F401_PA10 GPIO Mode:PA10
USART1_RX
4GND Ground - Ground
5USB_DM/USART1_CTS I/O STM32F401_PA11 GPIO Mode:PA11
USB_DM
USART_CTS
6USB_DP/USART1_RTS I/O STM32F401_PA12 GPIO Mode:PA12
USB_DP
USART_RTS
7GND Ground - Ground
8MCU_RST I STM32F401_NRST NRST
9SWDIO I/O STM32F401_PA13 GPIO Mode:PA13
SWDIO
10 SWCLK I/O STM32F401_PA14 GPIO Mode:PA14
SWCLK
Pin
No. Terminal Name Type Connection to
IC terminal Description
1GND Ground - Ground input
2GND Ground - Ground input
3VCC Power - 5V~12V power input
4NC - - NC
J1 connector
J2 connector
