4.
Hardware User Guide
4.1
Connectors
4.1.1
ATtiny3217 Curiosity Nano Pinout
All the ATtiny3217 I/O pins are accessible at the edge connectors on the board. The image below shows the board
pinout.
Figure 4-1. ATtiny3217 Curiosity Nano Pinout
USB
DEBUGGER
ATtiny3217
SW0
LED0
PS LED
NC
NC
ID
ID
CDC RX
CDCRX
USART0 TX
PB2
CDC TX
CDCTX
USART0 RX
PB3
DBG1
DBG1
PA3
LED0
DBG2
DBG2
PB7
SW0
PA1
PA1
USART0 TX
PA2
PA2
USART0 RX
PB1
PB1
I2C0 SDA
PTC XY4
PB0
PB0
I2C0 SCL
PTC XY5
PC2
PC2
SPI0 MOSI
PTC XY8
PC1
PC1
SPI0 MISO
PTC XY7
PC0
PC0
SPI0 SCK
PTC XY6
PC3
PC3
SPI0 SS
PTC XY9
GND
GND
PB2
PB2
USART0 TX
(TOSC2)
PB3
PB3
USART0 RX
(TOSC1)
VBUS
VBUS
VOFF
VOFF
DBG3
DBG3
(PA0)
DBG0
DBG0
PA0
UPDI
GND
GND
VTG
VTG
PC5
PC5
ADC1 AIN11
PTC XY11
PC4
PC4
ADC1 AIN10
PTC XY10
PA4
PA4
ADC0 AIN4
PTC XY0
TCA0 WO4
PB4
PB4
ADC0 AIN9
PTC XY13
TCA0 WO1
PA5
PA5
ADC0 AIN5
PTC XY1
TCA0 WO5
PA6
PA6
ADC0 AIN6
PTC XY2
PA7
PA7
ADC0 AIN7
PTC XY3
PB5
PB5
ADC0 AIN8
PTC XY12
GND
GND
PB6
PB6
PB7
PB7
SW0
DEBUGGER
ATtiny3217
Analog
Debug
I2C
SPI
UART
Peripheral
Port
PWM
Power
Ground
Touch
Shared pin
ATtiny3217
Curiosity Nano
4.1.2
Using Pin Headers
The edge connector footprint on ATtiny3217 Curiosity Nano has a staggered design where each hole is shifted 8 mil
(~0.2 mm) off-center. The hole shift allows the use of regular 100 mil pin headers on the board without soldering.
Once the pin headers are firmly in place, they can be used in normal applications like pin sockets and prototyping
boards without any issues.
Tip:
Start at one end of the pin header and gradually insert the header along the length of the board.
Once all the pins are in place, use a flat surface to push them in.
Tip:
For applications where the pin headers will be used permanently, it is still recommended to solder
them in place.
ATtiny3217
Hardware User Guide
©
2020 Microchip Technology Inc.
User Guide
DS40002193A-page 24
