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
10
4.
Hardware User Guide
4.1
Connectors
This chapter describes the implementation of the relevant connectors and headers on SAM D21 Xplained Pro
and their connection to the ATSAMD21J18A. The tables of connections in this chapter also describes which
signals are shared between the headers and on-board functionality.
4.1.1
I/O Extension Headers
The SAM D21 Xplained Pro headers EXT1, EXT2 and EXT3 offer access to the I/O of the microcontroller
in order to expand the board e.g. by connecting extensions to the board. These headers all comply with the
pitch of 2.54 mm.
Table 4-1. Extension Header EXT1
Pin on EXT1
SAM D21 pin
Function
Shared functionality
1 [ID]
-
-
Communication line to ID chip
on extension board.
2 [GND]
-
-
GND
3 [ADC(+)]
PB00
AIN[8]
4 [ADC(-)]
PB01
AIN[9]
5 [GPIO1]
PB06
GPIO
6 [GPIO2]
PB07
GPIO
7 [PWM(+)]
PB02
TC6/WO[0]
8 [PWM(-)]
PB03
TC6/WO[1]
9 [IRQ/GPIO]
PB04
EXTINT[4]
10 [SPI_SS_B/GPIO]
PB05
GPIO
11 [TWI_SDA]
PA08
SERCOM2 PAD[0] I²C SDA
EXT2, EXT3, and EDBG
12 [TWI_SCL]
PA09
SERCOM2 PAD[1] I²C SCL
EXT2, EXT3, and EDBG
13 [USART_RX]
PB09
SERCOM4 PAD[1] UART RX
1
14 [USART_TX]
PB08
SERCOM4 PAD[0] UART TX
1
15 [SPI_SS_A]
PA05
SERCOM0 PAD[1] SPI SS
16 [SPI_MOSI]
PA06
SERCOM0 PAD[2] SPI MOSI
17 [SPI_MISO]
PA04
SERCOM0 PAD[0] SPI MISO
18 [SPI_SCK]
PA07
SERCOM0 PAD[3] SPI SCK
19 [GND]
-
-
GND
20 [VCC]
-
-
VCC
Notes:
1
The SERCOM4 module is shared between EXT1, 2 and 3 UART's, but uses different pins on EXT1 and EXT2/3.
Table 4-2. Extension Header EXT2
Pin on EXT2
SAM D21 pin
Function
Shared functionality
1 [ID]
-
-
Communication line to ID chip
on extension board.
2 [GND]
-
-
GND
3 [ADC(+)]
PA10
AIN[18]
4 [ADC(-)]
PA11
AIN[19]
5 [GPIO1]
PA20
GPIO
6 [GPIO2]
PA21
GPIO
7 [PWM(+)]
PB12
TC4/WO[0]
8 [PWM(-)]
PB13
TC4/WO[1]