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.
| 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) | - |
| 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) | - |