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Description
The ATtiny25/45/85 is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATtiny25/45/85 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed. 8KB ISP flash memory, 512B EEPROM, 512-Byte SRAM, 6 general-purpose I/O lines, 32 general purpose working registers, one 8-bit timer/counter with compare modes, one 8-bit high-speed timer/counter, USI, internal and external Interrupts, 4-channel 10-bit Analog to Digital converter, programmable watchdog timer with internal oscillator, three software selectable power saving modes, and debug WIRE for on-chip debugging. The device achieves a throughput of 20 MIPS at 20 MHz and operates between 2.7-5.5 volts.
By executing powerful instructions in a single clock cycle, the device achieves throughputs approaching 1 MIPS per MHz, balancing power consumption and processing speed.
Features of ATtiny85 Microcontroller:-
- Flash (Kbytes): 8 Kbytes
- Pin Count: 8
- Max. Operating Freq. (MHz): 20 MHz
- CPU: 8-bit AVR
- Number of Touch channels: 3
- Hardware QTouch Acquisition: No
- Max I/O Pins: 6
- Ext Interrupts: 6
- USB Interface:No
- Package - SMD
to read more here is the datasheet
Pinout Description of the ATTINY85 SMD:
| Pin no. | Pin Name | Description | Secondary Function |
| 1 | PB5 (PCINT5/ADC0/dW) | Pin5 of PORTB | PCINT5: Pin Change Interrupt 0, Source5 RESET: Reset Pin ADC0: ADC Input Channel 0 DW: debug WIRE I/O |
| 2 | PB3 (PCINT3/XTAL1/CLKI/ADC3) | Pin3 of PORTB | PCINT3: Pin Change Interrupt 0, Source3 XTAL1: Crystal Oscillator Pin1 CLKI: External Clock Input OC1B: Complementary Timer/Counter1 Compare Match B Output ADC3 : ADC Input Channel 3 |
| 3 | PB4 (PCINT4/XTAL2/CLKO/OC1B/ADC2) | Pin4 of PORTB | PCINT4 : Pin Change Interrupt 0, Source 4 XTAL2 : Crystal Oscillator Pin 2 CLKO : System Clock Output OC1B: Timer/Counter1 Compare Match B Output ADC2 : ADC Input Channel 2 |
| 4 | GND | Connected to Ground | |
| 5 | PB0(MOSI/DI/SDA/AIN0/OC0A/AREF/ PCINT0) | Pin0 of PORTB | MOSI : SPI Master Data Output / Slave Data Input DI : USI Data Input (Three Wire Mode) SDA : USI Data Input (Two Wire Mode) AIN0 : Analog Comparator, Positive Input OC0A : Timer/Counter0 Compare Match A output : Complementary Timer/Counter1 Compare Match A Output AREF : External Analog Reference PCINT0 : Pin Change Interrupt 0, Source 0 |
| 6 | PB1(MISO/D0/AIN1/OC0B/OC1A/ PCINT1) | Pin1 of PORTB | MISO : SPI Master Data Input / Slave Data Output DO : USI Data Output (Three Wire Mode) AIN1 : Analog Comparator, Negative Input OC0B : Timer/Counter0 Compare Match B Output OC1A: Timer/Counter1 Compare Match A Output PCINT1 : Pin Change Interrupt 0, Source 1 |
| 7 | PB2(SCK/USCK/SCL/ADC1/T0/INT0/ PCINT2) | Pin2 of PORTB | SCK : Serial Clock Input USCK : USI Clock (Three Wire Mode) SCL : USI Clock (Two Wire Mode) ADC1 : ADC Input Channel 1 T0 : Timer/Counter0 Clock Source INT0 : External Interrupt 0 Input PCINT2 : Pin Change Interrupt 0, Source 2 |
| 8 | VCC | Connected to a positive voltage |