4.
Hardware Users Guide
4.1.
Headers and Connectors
4.1.1.
ATZB-SAMR21-XPRO Extension Header
ATZB-SAMR21-XPRO has an Xplained Pro Standard Extension Header (J100) marked with EXT in PCB
silkscreen. This header makes it possible to connect the board to any Xplained Pro MCU board. The pin-
out definition for the extension header is shown below.
Table 4-1. ATZB-SAMR21-XPRO Extension Header J100
Pin on EXT
Function
Description
1
ID_DATA
Communication line to ID chip
2
GND
Ground
3
ADC(+)
NC
4
ADC(-)
NC
5
FEM_CSD
NC
6
CLK_OUT
NC
7
PWM(+)
RESET to ZigBit
8
PWM(-)
NC
9
IRQ/GPIO
NC
10
SPI_SS_B/GPIO
GPIO for Atmel Authentication Chip ATECC508A
communication
11
TWI_SDA
Data line for I
2
C interface between host and ZigBit
12
TWI_SCL
Data line for I
2
C interface between host and ZigBit
13
UART_RX
ZigBit UART Transmit
14
UART_TX
ZigBit UART Receive
15
SPI_SS_A
Slave select for SPI. Should be unique if possible.
16
SPI_MOSI
Master out slave in line of Serial peripheral interface.
Always implemented, bus type.
17
SPI_MISO
Master in slave out line of Serial peripheral interface.
Always implemented, bus type.
18
SPI_SCK
Clock for Serial peripheral interface. Always implemented,
bus type.
19
GND
Ground
20
VCC_TARGET
Power for extension board
Atmel ATZB-SAMR21-XPRO [USER GUIDE]
Atmel-42695A-ATZB-SAMR21-XPRO_User Guide-08/2016
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