Please refer to ATTINY402 for further details about how
ATTINY804 operates. It's functionally equivilent and there were no substantive
differences worth noting.
- 20MHz @ 5V (10MHz @ 3.3V)
- 8KB Flash
- 512B SRAM
- 128B EEPROM
| Pin | Port | Function | Usage |
|---|---|---|---|
| 1 | VCC |
5V | |
| 2 | PA4 | LUT0.OUT |
WS2812 Serial Waveform |
| 3 | PA5 | AIN5 |
Analog Keypad |
| 4 | PA6 | Unused. | |
| 5 | PA7 | Unused. | |
| 6 | PB3 | Unused. | |
| 7 | PB2 | Unused. | |
| 8 | PB1 | TWI.SDA |
TWI (I2C) Data Signal |
| 9 | PB0 | TWI.SCL |
TWI (I2C) Clock Signal |
| 10 | PA0 | UPDI |
Debug interface. |
| 11 | PA1 | USART.TxD |
Raw LED bitstream. |
| 12 | PA2 | USART.RxD |
Unused. |
| 13 | PA3 | USART.XCK |
Raw LED bitstream clock. |
| 14 | GND |
No substantive differences were noted. The EVSYS register has one less