Техническая Спецификация для Atmel Xplained Pro Evaluation Kit ATSAMD20-XPRO ATSAMD20-XPRO
Модели
ATSAMD20-XPRO
Atmel SAM D20 Xplained Pro [USER GUIDE]
42102C-MCU-02/2014
8
Pin number
Name
Description
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 D20 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)
4
VCC_P3V3
Regulated 3.3V (output, used as
main power for the kit)
Note
If the board is powered from a battery source it is recommended to use the PWR header. If there
is a power source connected to EDBG USB, the EDBG is activated and it will consume more
power.