Microchip Technology SAMC21N Xplained Pro, Manual

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4.5.2 Virtual COM Port
The Embedded Debugger acts as a Virtual Com Port gateway by using one of the ATSAMC21N18A
UARTs. For further information on how to use the Virtual COM port, see
Embedded Debugger .
Table 4-30. Virtual COM Port Connections
SAMC21N pin Function Shared functionality
PB10 SERCOM4 PAD[2] UART TXD (SAMC21N TX line) -
PB11 SERCOM4 PAD[3] UART RXD (SAMC21N RX line) -
4.5.3 Atmel Data Gateway Interface
The Embedded Debugger features an Atmel Data Gateway Interface (DGI) by using either an SPI or I²C.
The DGI can be used to send a variety of data from the ATSAMC21N18A to the host PC. For further
information on how to use the DGI interface, see
Data Visualizer and the EDBG User Guide .
Table 4-31. DGI Interface Connections when using SPI
SAMC21N pin Function Shared functionality
PC09 SERCOM7 PAD[1] SPI SS
(Slave select) (SAMC21N is
Master) -
PC12 SERCOM7 PAD[0] SPI MISO
(Master In, Slave Out) EXT3 , Shield , and Shield(2)
PC14 SERCOM7 PAD[2] SPI MOSI
(Master Out, Slave In) EXT3 , Shield , and Shield(2)
PC11 SERCOM7 PAD[3] SPI SCK
(Clock Out) EXT3 , Shield , and Shield(2)
Table 4-32. DGI Interface Connections when using I²C
SAMC21N pin Function Shared functionality
PA16 SERCOM1 PAD[0] I
2
C SDA (Data
line)
EXT2 , EXT3 , Shield , and Crypto Device
PA17 SERCOM1 PAD[1] I
2
C SCL (Clock
line)
EXT2 , EXT3 , Shield , and Crypto Device
Four GPIO lines are connected to the Embedded Debugger. The EDBG can monitor these lines and time
stamp pin value changes. This makes it possible to accurately time stamp events in the SAMC21N
application code. For further information on how to configure and use the GPIO monitoring features, see
Data Visualizer and the EDBG User Guide .
Table 4-33. GPIO Lines Connected to the EDBG
SAMC21N pin Function Shared functionality
PB12 DGI_GPIO0 or TC4/WO[0] or X[12]/Y[28] EXT1
PA22 DGI_GPIO1 or TCC1/WO[0] or X[10]/Y[26] EXT1
SAMC21N Xplained Pro
©
2017 Microchip Technology Inc.
User Guide
DS70005318A-page 29