1.2.2.2 Host MCU Board with mikroBUS Socket via mikroBUS Interface

The RNBD451 Add On Board can also be used by host MCU boards with mikroBUS sockets using the control interface. The following table shows how the pinout on the RNBD451 Add On Board mikroBUS interface corresponds to the pinout on the mikroBUS socket.

Table 1-3. RNBD451PE Connection to mikroBUS Interface
Pin No on mikroBUS	Standard Pin on mikroBUS	Pin on RNBD451PE Module	Description
1	AN	PB2, UART MODE SWITCH	UART mode switch
2	RST	NMCLR	RNBD451PE module reset pin
3	CS	PA4, UART RTS	RNBD451PE module UART RTS
4	SCK	PB3, BT_STATUS_IND1	Bluetooth Low Energy status indication 1
5	MISO	PB7, BT_STATUS_IND2	Bluetooth Low Energy status indication 2
6	MOSI	PA2, UART_TX_IND	UART transmit indication from the RNBD451PE module
7	3.3V	—	3.3V from host MCU socket
8	GND	GND	GND
9	GND	GND	GND
10	5V	—	NC
11	SDA	—	NC
12	SCL	—	NC
13	RX	PB6, UART RXD	RNBD451PE module UART RXD
14	TX	PA5, UART TXD	RNBD451PE module UART TXD
15	INT	PA6, UART CTS	RNBD451PE module UART CTS
16	PWM	PB4, UART RX INDICATION	UART RX indication to RNBD451PE module