3.9 Arduino UNO R3 Interface

The PIC32CM SG00/GC00 Curiosity Pro development board has an Arduino UNO R3 compatible header which enables the use of Arduino shields. Peripherals, such as ADC, SPI, I²C, UART, and PWM of the PIC32CM SG00/GC00 MCU can be interfaced with the Arduino shields using the Arduino UNO R3 interface. For additional information on the interface, refer to the Arduino UNO R3.

Note that some of these pins are shared between Extension headers and mikroBUS socket.

Figure 3-13. ArduinoUNO Compatible Headers Schematic

Table 3-7. Arduino UNO R3 (Analog In) Header Pin Assignment
Pin Number	Pin Name	Description	GPIO
1	ADC0	Analog input 0	PA08
2	ADC1	Analog input 1	PB04
3	ADC2	Analog input 2	PB03
4	ADC3	Analog input 3	PB00
5	ADC4	Analog input 4	PA05
6	ADC5	Analog input 5	PB05

Table 3-8. Arduino UNO R3 (Power) Header Pin Assignment
Pin Number	Pin Name	Description	GPIO
1	NC	Not connected	-
2	IOREF	Reference for digital logic V	VCC_P3V3
3	Reset	Reset	RESET
4	+3V3	+3V3 Power Rail	VCC_P3V3
5	+5V	+5V Power Rail	VCC_P5V0
6	GND	Ground	GND
7	GND	Ground	GND
8	VIN	Voltage Input	VCC_P5V0

Table 3-9. Arduino UNO R3 (Digital 1) Header Pin Assignment
Pin Number	Pin Name	Description	GPIO
1	D0/RX	Digital pin 0/GPIO	PB15
2	D1/TX	Digital pin 1/GPIO	PB16
3	D2	Digital pin 2/GPIO	PC11
4	D3/PWM	Digital pin 3/GPIO	PB13
5	D4	Digital pin 4/GPIO	PC13
6	D5/PWM	Digital pin 5/GPIO	PB12
7	D6/PWM	Digital pin 6/GPIO	PB14
8	D7	Digital pin 7/GPIO	PC12

Table 3-10. Arduino UNO R3 (Digital 2) Header Pin Assignment
Pin Number	Pin Name	Description	GPIO
1	D8	Digital pin 8/GPIO	PD14
2	D9/PWM	Digital pin 9/GPIO	PD07
3	D10/SS	SPI Chip Select	PA19
4	D11/MOSI	SPI1 Main Out Secondary In	PA16
5	D12/MISO	SPI Main In Secondary Out	PA15
6	D13/SCK	SPI serial clock output	PA17
7	GND	Ground	GND
8	AREF	Analog reference voltage	VREFH
9	D14/TWI_SDA	Digital pin /I²C Data line	PD01
10	D15/TWI_SCL	Digital pin/I²C Clock line	PD00