Atmel Xplained Pro Evaluation Kit ATSAMD20-XPRO ATSAMD20-XPRO Data Sheet
Product codes
ATSAMD20-XPRO
338
Atmel | SMART SAM D20 [DATASHEET]
Atmel-42129K–SAM-D20_datasheet–06/2014
24.3
Block Diagram
Figure 24-1. USART Block Diagram
24.4
Signal Description
for details on the pin mapping for this peripheral. One signal
can be mapped on several pins.
24.5
Product Dependencies
In order to use this peripheral, other parts of the system must be configured correctly, as described below.
24.5.1 I/O Lines
Using the USART’s I/O lines requires the I/O pins to be configured using port configuration (PORT).
for details.
When the SERCOM is used in USART mode, the pins should be configured according to
transmitter is disabled, these pins can be used for other purposes.
Table 24-1. USART Pin Configuration
TxD
RxD
XCK
rx shift register
TX DATA
tx shift register
rx buffer
RX DATA
status
STATUS
BAUD
baud rate generator
Internal Clk
(GCLK)
/1 - /2 - /16
Signal name
Signal Name
Type
Description
PAD[3:0]
Digital I/O
General SERCOM pins
Pin
Pin Configuration
TxD
Output
RxD
Input
XCK
Output or input