4.1.1 ATtiny104 Xplained Nano Pinout

The ATtiny104 Xplained Nano has a direct fan-out of the I/O pins of the device and all I/O’s are accessible at the edge connectors.

Table 4-1. Edge Connector
Edge ConnectorATtiny104 PinFunctionsShared Functionality
1VCCPower supply
2PA[0]PCINT0/ADC0/AIN0/T0/CLKI/TPICLKmEDBG TPI Clock
3PA[1]PCINT1/ADC1/AIN1/OC0B/TPIDATAmEDBG TPI Data
4PA[2]PCINT2/RESETmEDBG Reset
5PA[3]PCINT3/OC0A
6PA[4]PCINT4/ICP0
7PA[5]PCINT5/ADC2/OC0BUser LED
8PA[6]PCINT6/ADC3
9PA[7]PCINT7
10PB[0]PCINT8/ADC4
11PB[1]PCINT9/INT0/ADC5/XCK0/OC0A/CLKOUser button
12PB[2]PCINT10/ADC6/TxD0/ICP0mEDBG CDC RX
13PB[3]PCINT11/ADC7/ACO/RxD0/T0mEDBG CDC TX
14GNDGround