Pin on EXT4
SAM G55 pin
SAM G55 Peripheral
Function
Shared Functionality
8 [PWM(-)]
-
-
9 [IRQ/GPIO]
PB14
-
10 [SPI_SS_B/GPIO]
-
-
11 [TWI_SDA]
PB10
TWD4
EDBG and EXT1 connector
(TWI)
12 [TWI_SCL]
PB11
TWCK1
EDBG and EXT1 connector
(TWI)
13 [USART_RX]
-
-
14 [USART_TX]
-
-
15 [SPI_SS_A]
-
-
16 [SPI_MOSI]
-
-
17 [SPI_MISO]
-
-
18 [SPI_SCK]
-
-
19 [GND]
-
-
GND
20 [VCC]
-
-
VCC
4.1.2.
High Speed TWI Interface
The extension connector marked with "Host I
2
C" targets I
2
C hosts that want to connect to the SAM G55
high speed I
2
C slave interface. Besides I
2
C communication, a GPIO and the SAM G55 reset are
available. The GPIO can serve as a IRQ to the host and the reset can be used by the host to reset the
SAM G55.
Table 4-4. SAM G55 High Speed I
2
C Slave Interface
Pin on I
2
C
Connector
Pin on SAM G55
SAM G55
Peripheral
Function
Shared Functionality
1
-
-
2
PA01
NCHG
TIOB0
3
PA16
GPIO
WKUP7
4
RESET
Reset
5
PA03
TWD0
6
PA04
TWCK0
7
-
-
VCC
8
-
-
GND
Atmel SAM G55 Xplained Pro [USER GUIDE]
Atmel-42389B-SAM-G55-Xplained-Pro_User Guide-04/2016
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