Table 4-2. J201 Digital I/O High Header
J201 ATtiny817 Pin Arduino Numbering Functions Comment
1
PC5
D8
TCA_W5
Not connected by default. Can be connected by adding a 0Ω resistor to
R204. Shared with
2
PA0
D9
UPDI
Not connected by default. Can be connected by adding a 0Ω resistor to
R200. Shared with
3
PC3
D10
SPI SS
4
PC2
D11
SPI MOSI Shared with
5
PC1
D12
SPI MISO Shared with
6
PC0
D13
SPI SCK
Shared with
7
GND
GND
8
AREF
9
PA1
D14
I2C SDA
10
PA2
D15
I2C SCL
Table 4-3. J202 Digital I/O Low Header
J202
ATtiny817 Pin
Arduino Numbering
Functions
Comment
1
PB3
D0
UART RX
Shared with
2
PB2
D1
UART TX
Shared with
3
PB4
D2
TCA W1
4
PB5
D3
TCA W2
5
PA3
D4
TCA W3
6
PC4
D5
TCA W4
7
PB6
D6
8
PB7
D7
Table 4-4. J203 Power Header
J203 ATtiny817 Pin Arduino Numbering Functions
Comment
1
NC
2
VCC
IOREF
VCC_TARGET
3
PC5
RESET
GPIO
Disconnected by not mounted 0Ω resistor R208. Shared with
4
3.3V
VCC_P3V3
5
5.0V
VCC_P5V0
6
GND
GND
ATtiny817 Xplained Mini
Hardware User Guide
©
2019 Microchip Technology Inc.
User Guide
DS50002657B-page 13