Atmel SAM4L Xplained Pro Evaluation Kit Atmel ATSAM4L-XPRO ATSAM4L-XPRO Data Sheet
Product codes
ATSAM4L-XPRO
Atmel SAM4L Xplained Pro [USER GUIDE]
42074B-MCU-05/2013
15
Table 4-7. External 32.768kHz crystals.
Pin on SAM4L
Function
XIN32
XIN32
XOUT32
XOUT32
Table 4-8. External 12MHz crystals.
Pin on SAM4L
Function
PA00
XIN0
PA01
XOUT0
4.2.3
Mechanical buttons
The SAM4L Xplained Pro contains two mechanical buttons. One button is the RESET button connected to the
SAM4L reset line and the other is a generic user configurable button. When a button is pressed it will drive the
I/O line to GND.
Table 4-9. Mechanical buttons.
Pin on SAM4L
Silkscreen text
RESET_N
RESET
PC24
SW0
4.2.4
LED
There is one yellow LED available on the SAM4L Xplained Pro board that can be turned on and off. The LED
can be activated by driving the connected I/O line to GND.
Table 4-10. LED connections.
Pin on SAM4L
LED
PC07
Yellow LED0
4.3
Embedded Debugger implementation
The SAM4L Xplained Pro contains an Embedded Debugger (EDBG) that can be used to program and debug
the ATSAM4LC4C using Serial Wire Debug (SWD). The Embedded debugger also include a Virtual Com port
interface over UART, an Atmel Data Gateway Interface over synchronous UART and TWI and it monitors four
of the SAM4L GPIOs. Atmel Studio can be used as a front end for the Embedded Debugger.
4.3.1
Serial Wire Debug
The Serial Wire Debug (SWD) use two pins to communicate with the target. For further information on how to
Table 4-11. SWD connections.
Pin on SAM4L
Function
TCK
SWD clock
PA03
SWD data
PA23
SWD trace data
4.3.2
Virtual COM port
The Embedded Debugger act as a Virtual Com Port gateway by using one of the ATSAM4LC4C UARTs. For
further information on how to use the Virtual COM port see
Table 4-12. Virtual COM port connections.
Pin on SAM4L
Function
PC27
UART TXD (SAM4L TX line)
PC26
UART RXD (SAM4L RX line)