Extension Header Area

The marked area on the grid I7 to R8 can be used for strapping in an Xplained Pro extension header or a 10-pin legacy Xplained/RZ600 header.

Figure 1. Extension Header Area

The SPI bus signals are available close to the header at row J and K, enabling easy connection to header pin 15 to 18.

Using pins 11 to 20 enables connection of the 10-pin legacy header used on the RZ600 wireless modules and the 10-pin Xplained sensor modules.

The general bus connections for an Xplained Pro Extension board are indicated in the table below. Detailed wiring can be found in the selected extension board documentation.

Table 1. Extension Header Typical Signals
Pin Signal Name Signal Description
1 ID Communication line to the ID chip on the Xplained extension board
2 GND Ground
3 ADC(+) Analog-to-Digital converter, alternatively positive part of differential ADC
4 ADC(-) Analog-to-Digital converter, alternatively negative part of differential ADC
5 GPIO1 General purpose I/O
6 GPIO2 General purpose I/O
7 PWM(+) Pulse-Width Modulation, alternatively positive part of differential PWM
8 PWM(-) Pulse-Width Modulation, alternatively negative part of differential PWM
9 IRQ/GPIO Interrupt request line and/or general purpose I/O
10 SPI_SS_B/ GPIO Slave B select for SPI and/or general purpose I/O
11 I2C_SDA Data line for I2C interface
12 I2C_SCL Clock line for I2C interface
13 UART_RX Receiver line of ATmega168PB USART
14 UART_TX Transmitter line of ATmega168PB USART
15 SPI_SS_A Slave A select for SPI
16 SPI_MOSI Master out slave in line of serial peripheral interface
17 SPI_MISO Master in slave out line of serial peripheral interface
18 SPI_SCK Clock for serial peripheral interface
19 GND Ground
20 VCC Power for extension board