Atmel Xplained Pro Evaluation Kit for the ATSAMD21J18A Microcontroller ATSAMD21-XPRO ATSAMD21-XPRO Fiche De Données
Codes de produits
ATSAMD21-XPRO
Atmel SAM D21 Xplained Pro [USER GUIDE]
42220A-MCU-02/2014
8
always connected. However, all the connected pins follow the defined pin-out described in
Xplained Pro extensions to Xplained Pro MCU boards and to access the pins of the target MCU on Xplained
Pro MCU board directly.
Table 3-4. Xplained Pro Extension Header
Pin number
Name
Description
1
ID
Communication line to the ID chip on 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 positive part of
differential PWM.
9
IRQ/GPIO
Interrupt request line and/or general purpose I/O.
10
SPI_SS_B/GPIO
Slave select for SPI and/or general purpose I/O.
11
TWI_SDA
Data line for two-wire interface. Always implemented, bus
type.
12
TWI_SCL
Clock line for two-wire interface. Always implemented, bus
type.
13
USART_RX
Receiver line of Universal Synchronous and Asynchronous
serial Receiver and Transmitter.
14
USART_TX
Transmitter line of Universal Synchronous and
Asynchronous serial Receiver and Transmitter.
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
Power for extension board.
3.4.2
Xplained Pro Power Header
The power header can be used to connect external power to the SAM D21 Xplained Pro kit. The kit will
automatically detect and switch to the external power if supplied. The power header can also be used as supply
for external peripherals or extension boards. Care must be taken not to exceed the total current limitation
of the on-board regulator for the 3.3V regulated output. To locate the current measurement header, refer to
Table 3-5. Power Header PWR
Pin number PWR header
Pin name
Description
1
VEXT_P5V0
External 5V input
2
GND
Ground
3
VCC_P5V0
Unregulated 5V (output, derived
from one of the input sources)