Microchip Technology ATtiny3217 Xplained Pro, Manual

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EXT3 Pin ATtiny3217 Pin Function Shared Functionality
18 [SPI_SCK] PC0 SPI SCK EXT1 and EDBG SPI
19 [GND] - - Ground
20 [VCC] - - Power for extension board
1) Not connected by default, see 4.5.1 Connecting the 32.768 kHz Crystal for more information.
Note: Signal functions in italic use alternative pin location. These have to be configured in the PORTMUX register of
the device.
4.2.2 UPDI Debug Connector
ATtiny3217 Xplained Pro has a 10-pin 50-mil UPDI Debug Connector that can be used to attach external debuggers
to the ATtiny3217.
Table 4-3. UPDI Debug Connector
UPDI Debug Connector
Pin Pin/Net Function Shared Functionality
1 - -
2 GND Ground
3 PA0 UPDI/RESET EDBG
4 VCC_TARGET_P3V3 ATtiny3217 voltage
5 - -
6 PC5 - SW1 and EXT3
7 - -
8 - -
9 - -
10 - -
Note:
1. PA0 is configured as UPDI by default. PA0 can be fused to be RESET or GPIO, but this is prevented by the
EDBG, as this will disable all further programming and debugging by the EDBG.
2. Even though PC5 is connected to the UPDI debug connector, this pin is not used for programming or
debugging.
4.3 Peripherals
4.3.1 Mechanical Buttons
ATtiny3217 Xplained Pro contains two generic user-configurable mechanical buttons. When a button is pressed, it will
drive the I/O line to GND.
Info: There is no pull-up resistor connected to the generic user button SW0. Remember to enable the
internal pull-up in the ATtiny3217 to use the button. There is an on-board pull-up resistor connected to the
generic user button SW1. There is no need to enable the internal pull-up in the ATtiny3217 to use the
button.
ATtiny3217 Xplained Pro
Hardware User Guide
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2020 Microchip Technology Inc.
User Guide
DS50002765B-page 15