Peripherals - Microchip Technology SAM R30 Xplained Pro User Manual

4.3

Peripherals

4.3.1 Crystal
The SAM R30 Xplained Pro kit contains a 32.768 kHz crystal that can be used as a clock source for the
SAM R30 device. A cut-strap next to the crystal is used to measure the oscillator safety factor. This is
done by cutting the strap and adding a resistor across the strap. More information about oscillator
allowance and safety factor can be found in the
Table 4-5. External 32.768 kHz Crystal
Pin on SAM R30
PA00
PA01
Table 4-6. External 16 MHz Crystal
Pin on SAM R30
XTAL1
XTAL2
4.3.2 Mechanical Buttons
The SAM R30 Xplained Pro contains two mechanical buttons.
• The RESET button is connected to the SAM R30 reset line:
–
• Generic user configurable button:
–
Table 4-7. Mechanical Buttons
SAM R30 Pin
RESET
PA28
4.3.3 LEDs
The SAM R30 Xplained Pro board contain two LEDs. The LEDs can be activated by driving the
connected I/O line to ground (GND).
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2017 Microchip Technology Inc.
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Info: The 16 MHz crystal is connected directly to the RF die inside the SAM R30. The clock
signal generated by this crystal is routed from the CLKM pin on the RF die to a GCLK I/O pin on
the microcontroller. For more information on how the RF die is connected to the microcontroller
and how to configure the CLKM pin, see the
When the RESET button is pressed, it drives the reset line to ground
When the user button is pressed, it drives the I/O line to ground
note: There is no pull-up resistor connected to the generic user button. Remember to enable
the internal pull-up in the SAM R30 to use the button.
Silkscreen Text
RESET
SW0
AVR4100 application note from Microchip.
SAM R30
Function
XIN32
XOUT32
Function
XIN
XOUT
User Guide
ATSAMR30-XPRO
datasheet.
Shared Functionality
-
EXT1
DS50002612A-page 18