4.6 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 4-6. 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 4-9. Extension Header Typical Signals
PinSignal NameSignal Description
1IDCommunication line to the ID chip on the Xplained extension board
2GNDGround
3ADC(+)Analog-to-Digital converter, alternatively positive part of differential ADC
4ADC(-)Analog-to-Digital converter, alternatively negative part of differential ADC
5GPIO1General purpose I/O
6GPIO2General purpose I/O
7PWM(+)Pulse-Width Modulation, alternatively positive part of differential PWM
8PWM(-)Pulse-Width Modulation, alternatively negative part of differential PWM
9IRQ/GPIOInterrupt request line and/or general purpose I/O
10SPI_SS_B/ GPIOSlave B select for SPI and/or general purpose I/O
11I2C_SDAData line for I2C interface
12I2C_SCLClock line for I2C interface
13UART_RXReceiver line of ATmega328P USART
14UART_TXTransmitter line of ATmega328P USART
15SPI_SS_ASlave A select for SPI
16SPI_MOSIMaster out slave in line of serial peripheral interface
17SPI_MISOMaster in slave out line of serial peripheral interface
18SPI_SCKClock for serial peripheral interface
19GNDGround
20VCC Power for extension board