3.5 mikroBUS™ Sockets (J400 and J404)

There are two mikroBUS™ sockets (J400 and J404) that expands the functionality of the PIC32 WFI32 2.0 Curiosity HPC Board using the MikroElektronika click adapter boards and Microchip RN-based add-on boards.

The mikroBUS connector consists of:

Pair of 1x8 female headers with proprietary pin configuration and silkscreen markings
The pinout consists of three groups of communications pins:
- Serial Peripheral Interface (SPI)
- Universal Asynchronous Receiver/Transmitter (UART)
- Inter-Integrated Circuit (I²C)
Two power groups
- 3.3V, Ground line
- 5V, Ground line
Four additional pins
- Pulse Width Modulation (PWM)
- Reset Pin (RST)
- Interrupt
- Analog

Note: For a complete listing of the click boards, refer to www.mikroe.com/click.

In addition to all the mikroBUS socket (J400) interfaces, the mikroBUS socket (J404) has an additional PTA header (J407) to interface with RN-based add-on boards. The following table provides the pinout details of the mikroBUS sockets (J400 and J404).

Table 3-7. mikroBUS™ Socket Pin Description – J400
Pin Number	Pin on mikroBUS™ Socket	Pin Description of mikroBUS Socket	Pin on the WFI32E04 Module⁽¹⁾
J400-1	AN	Analog input	AN14/ANN0/CVD14/CVDR14/RPA14/RA14
J400-2	RST	Reset	TMS/AN6/CVD6/CVDR6/RPB6/RB6
J400-3	CS	SPI Chip Select (CS)	TDO/AN7/CVD7/CVDR7/RPB7/RB7
J400-4	SCK	SPI clock	SCK2/RPA11/RA11
J400-5	MISO	SPI Host Input Client Output	PTA_WLAN_ACTIVE/RPK5/RK5⁽⁵⁾
J400-6	MOSI	SPI Host Input Client Input	BT_CLK_OUT/RPK4/RK4
J400-7	+3.3V	3.3V power	NC
J400-8	GND	Ground	GND
J400-9	GND	Ground	GND
J400-10	+5V	5V power	NC
J400-11	SDA	I²C data	SDA1/RPA5/RA5
J400-12	SCL	I²C clock	SCL1/RPA4/RA4
J400-13	TX	UART/CAN transmit	PTA_BT_ACTIVE/RPK7/RK7⁽⁵⁾ or PGD4/AN9/CVD9/CVDR9/RPB9/RB9^{(2, 3)}
J400-14	RX	UART/CAN receive	PGD4/AN9/CVD9/CVDR9/RPB9/RB9 or PTA_BT_ACTIVE/RPK7/RK7^{(2, 3, 4)}
J400-15	INT	Hardware interrupt	PTA_BT_PRIO/RPK6/RK6⁽⁵⁾
J400-16	PWM	PWM output	ANA0/RPB12/RB12
Note: For more details on the WFI32E04 pins, refer to the PIC32MZ W1 MCU and WFI32 Module with Wi-Fi® and Hardware-Based Security Accelerator Data Sheet (DS70005425). For UART operation, the user must mount the jumper (J403) between pin 1-2 and 3-4. For CAN operation, the user must mount the jumper (J403) between pin 2-4 and 1-3. The user must ensure not to simultaneously use the UART-based MikroElectronika click boards on the mikroBUS socket (J400) and the QT7/QT8/T9 XPRO kit on the XPRO header (J412). For more details about PTA signals, refer to the PIC32MZ W1 MCU and WFI32 Module with Wi-Fi® and Hardware-Based Security Accelerator Data Sheet (DS70005425).

Table 3-8. mikroBUS™ Socket Pin Description – J404
Pin Number	Pin on mikroBUS™ Socket	Pin Description of mikroBUS Socket	Pin on the WFI32E04 Module⁽¹⁾
J404-1	AN	Analog input	AN0/RPB0/RB0
J404-2	RST	Reset	TMS/AN6/CVD6/CVDR6/CVDT1/RPB6/RB6
J404-3	CS	SPI Chip Select (CS)	AN10/CVD10/CVDR10/RPB10/RB10
J404-4	SCK	SPI clock	SCK1/RPC6/RC6
J404-5	MISO	SPI Host Input Client Output	SDI1/RPC7/RC7
J404-6	MOSI	SPI Host Input Client Input	SDO1/RPC8/RC8
J404-7	+3.3V	3.3V power	NC
J404-8	GND	Ground	GND
J404-9	GND	Ground	GND
J404-10	+5V	5V power	NC
J404-11	SDA	I2C data	SDA2/RPA3/RA3
J404-12	SCL	I2C clock	SCL2/RPA2/RA2
J404-13	TX	UART/CAN transmit	RPK9/RK9 or AN16/CVD16/CVDR16/RPA12/RA12^{(2, 3)}
J404-14	RX	UART/CAN receive	AN16/CVD16/CVDR16/RPA12/RA12 or USBID/AN2/CVD2/CVDR2/CVDT5/RPB2/RB2^{(2, 3)}
J404-15	INT	Hardware interrupt	ANN1/CVD15/CVDR15/RPA13/RA13
J404-16	PWM	PWM output	ANA0/RPB12/RB12
Note: For more details on the WFI32E04 pins, refer to the PIC32MZ W1 MCU and WFI32 Module with Wi-Fi® and Hardware-Based Security Accelerator Data Sheet (DS70005425). For UART operation, the user must mount the jumper (J410) between pin 3-2 and the jumper (J411) between pin 1-2 and 3-4. For CAN operation, the user must mount the jumper (J410) between pin 1-2 and the jumper (J411) between pin 2-4 and 1-3.

The mikroBUS socket (J404) also offers support to interface with Microchip RN-based boards. The following table provides the pinout details of the PTA header (J407) on the mikroBUS socket (J404).

Table 3-9. PTA Header with mikroBUS™ Socket (J404) – J407 Pinout Details
Pin Number	Pin on PTA Header	Pin Description of PTA Header	Pin on the WFI32E04 Module
J407-1	PTA_BT_ACTIVE	Packet Traffic Arbitration (PTA) Three-Wire interface for Wi-Fi® and Bluetooth® co-existence	PTA_BT_ACTIVE/RPK7/RK7⁽¹⁾
J407-2	PTA_BT_PRIO		PTA_BT_PRIO/RPK6/RK6⁽¹⁾
J407-3	PTA_WLAN_ACTIVE		PTA_WLAN_ACTIVE/RPK5/RK5⁽¹⁾
J407-4	GND	Ground	GND
Note: For more details about PTA signals, refer to the PIC32MZ W1 MCU and WFI32 Module with Wi-Fi® and Hardware-Based Security Accelerator Data Sheet (DS70005425).