2.5 Xplained Pro Standard Extension Header

The PIC32CZ CA80/CA90 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: All pins are not always connected.

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

Note: Due to a component footprint error, the pin-out of the External Power Connector (J101) is not compatible with the standard for extension boards. If an extender board is used that requires this header, an adapter must be used. See the schematic section of this document for the pinout of J101.

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	PA18
4	ADC0(-)	Analog-to-digital converter, alternatively negative part of differential ADC	PA17
5	GPIO1	General purpose I/O	PB25
6	GPIO2	General purpose I/O	PB26
7	PWMH1	High-Side PWM	PB10
8	PWML1	Low-Side PWM	PB11
9	GPIO3	General purpose I/O	PA7
10	GPIO4	General purpose I/O	PC24
11	SDA2	Data line for I²C interface. Always implemented, bus type	PC0
12	SCL2	Clock line for I²C interface. Always implemented, bus type.	PC1
13	RX2	Receiver line of target device UART	PC7
14	TX2	Transmitter line of target device UART.	PC4
15	SS2	SPI Select or General purpose I/O	PC10
16	MOSI	Host Out Client In (MOSI) line of serial peripheral interface. Always implemented, bus type.	PC8
17	MISO	Host In Client Out (MISO) line of serial peripheral interface. Always implemented, bus type.	PC11
18	SCK2	Clock for serial peripheral interface. Always implemented, bus type	PC9
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	PA14
4	ADC1(-)	Analog-to-digital converter, alternatively negative part of differential ADC	PA13
5	GPIO5	General purpose I/O	PB27
6	GPIO6	General purpose I/O	PB28
7	PWMH2	High-Side PWM	PA22
8	PWML2	Low-Side PWM	PA23
9	GPIO7	General purpose I/O	PA8
10	GPIO8	General purpose I/O	PE10
11	SDA2	Data line for I²C interface. Always implemented, bus type	PC25
12	SCL2	Clock line for I²C interface. Always implemented, bus type.	PC26
13	RX2	Receiver line of target device UART	PC22
14	TX2	Transmitter line of target device UART.	PC21
15	SS3	SPI Client Select or General purpose I/O	PC14
16	MOSI	Host Out Client In (MOSI) line of serial peripheral interface. Always implemented, bus type.	PC12
17	MISO	Host In Client Out (MISO) line of serial peripheral interface. Always implemented, bus type.	PC15
18	SCK2	Clock for serial peripheral interface. Always implemented, bus type	PC13
19	GND	Ground	-
20	VCC	Power for extension boards (3.3V)	-