Crystal; Led; Qtouch ® Button - Microchip Technology ATtiny3217 Xplained Pro Manual

Table 4-4. Mechanical Buttons
ATtiny3217 Pin
PB5
PC5
Info: PC5 is connected to a button that states 'SW1/RST' because PC5 had reset capabilities in an early
version of the ATtiny3217. Today the ATtiny3217 does not have any reset capabilities on PC5.
4.3.2

Crystal

The ATtiny3217 Xplained Pro kit contains a 32.768 kHz crystal, which can be used as the clock source for the
ATtiny3217 device. The crystal has a cut-strap next to it, which can be 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
There is a 9 pF, 32.768 kHz crystal in a 3.2 mm by 1.5 mm package mounted on ATtiny3217 Xplained Pro.
Info: The crystal is not connected to the device by default, as the crystal pins on the device are shared
with the UART module. The UART interface is lost if the crystal is needed by the application. See
Modifications
Table 4-5. External 32.768 kHz Crystal
ATtiny3217 Pin
PB2
PB3
Related Links
2.2 Design Documentation and Relevant Links
4.3.3

LED

There is one yellow LED available on the ATtiny3217 Xplained Pro board that can be turned ON and OFF. The LED
can be activated by connecting the I/O line to GND.
Table 4-6. LED Connection
ATtiny3217 Pin
PB4
®
4.3.4 QTouch Button
There are two self-capacitance buttons available on the ATtiny3217 Xplained Pro board, which can be used as input
buttons for an application. These QTouch buttons are intended to be driven by the built-in Peripheral Touch Controller
(PTC) of the device.
To get started using the QTouch buttons and the PTC, there is a similar example project that can be opened here:
QTouch Tiny817 Xplained Pro Selfcap Example
identical except for the device.
©
2020 Microchip Technology Inc.
Silkscreen Text
SW0
SW1/RST
AN2648 application note from Microchip.
for instructions on how to modify the kit for crystal operation.
Function
XOUT32
XIN32
Silkscreen Text
LED0
in Atmel Start (http://start.atmel.com/#examples). The two kits are
ATtiny3217 Xplained Pro
Shared Functionality
EXT3 and EDBG DGI
EXT3 and UPDI debug connector
Shared Functionality
EXT1
User Guide
Hardware User Guide
Kit
DS50002765B-page 16