2.5 Xplained Pro Standard Extension Header

The PIC32CK SG01/GC01 Curiosity Ultra development board has two Xplained Pro compatible interfaces that enable the use of existing expansion boards. Each interface consists of a dual-row, 30-pin, 100 mil, 90 degree extension male header, while Xplained Pro extensions have their female counterparts. The extension headers can be used to connect a variety of Xplained Pro extension boards or to access the pins of the target MCU directly.

Note: Not all pins are connected.

The pinout description for the Xplained Pro Standard Extension Header1 and Header 2 are listed in the following tables.

Table 2-4. EXT 1 Header Pinout
Pin number	Name	Description	Port
1	ID_EXT1	Communication line to the ID chip on an extension board	Connected to PKoB4
2	GND	Ground	-
3	ADC0(+)	Analog-to-digital converter (ADC), alternatively positive part of differential ADC	PA04
4	ADC0(-)	Analog-to-digital converter, alternatively negative part of differential ADC	PA05
5	GPIO1	General purpose I/O	PD18
6	GPIO2	General purpose I/O	PC26
7	PWMH1	High-Side PWM	PC01
8	PWML1	Low-Side PWM	PC02
9	GPIO3	General purpose I/O	PC19
10	GPIO4	General purpose I/O	PB15
11	SDA2	Data line for I²C interface. Always implemented, bus type	PB09
12	SCL2	Clock line for I²C interface. Always implemented, bus type.	PB10
13	RX2	Receiver line of target device UART	PB22
14	TX2	Transmitter line of target device UART.	PB21
15	SS2	SPI Select or General purpose I/O	PC14
16	MOSI	Host Out Client In (MOSI) line of serial peripheral interface. Always implemented, bus type.	PC15
17	MISO	Host In Client Out (MISO) line of serial peripheral interface. Always implemented, bus type.	PC17
18	SCK2	Clock for serial peripheral interface. Always implemented, bus type	PC16
19	GND	Ground	-
20	VCC	Power for extension boards (3.3V)	-

Table 2-5. EXT 2 Header Pinout
Pin number	Name	Description	Port/Pin
1	ID_EXT2	Communication line to the ID chip on an extension board	Connected to PKoB4
2	GND	Ground	-
3	ADC1(+)	Analog-to-digital converter, alternatively positive part of differential ADC	PA06
4	ADC1(-)	Analog-to-digital converter, alternatively negative part of differential ADC	PA07
5	GPIO5	General purpose I/O	PC27
6	GPIO6	General purpose I/O	PC18
7	PWMH2	High-Side PWM	PB07
8	PWML2	Low-Side PWM	PB08
9	GPIO7	General purpose I/O	PC29
10	GPIO8	General purpose I/O	PC28
11	SDA2	Data line for I²C interface. Always implemented, bus type	PB09
12	SCL2	Clock line for I²C interface. Always implemented, bus type.	PB10
13	RX2	Receiver line of target device UART	PD14
14	TX2	Transmitter line of target device UART.	PD13
15	SS3	SPI Client Select or General purpose I/O	PC23
16	MOSI	Host Out Client In (MOSI) line of serial peripheral interface. Always implemented, bus type.	PC15
17	MISO	Host In Client Out (MISO) line of serial peripheral interface. Always implemented, bus type.	PC17
18	SCK2	Clock for serial peripheral interface. Always implemented, bus type	PC16
19	GND	Ground	-
20	VCC	Power for extension boards (3.3V)	-

Note:

The PWMH2 and PWML2 pins (i.e., pin 7 and pin 8) share functionality with D9 and D10 of the Arduino Header or with QI1 and QI2 of the PDEC, depending on the position of the jumper on J303 and J304.