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ATtiny25/45/85 [DATASHEET]

2586PS–AVR–06/2013

The ATtiny25/45/85 provides the following features: 2/4/8K bytes of In-System Programmable Flash, 128/256/512

bytes EEPROM, 128/256/256 bytes 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, Universal Serial Interface, Internal

and External Interrupts, a 4-channel, 10-bit ADC, a programmable Watchdog Timer with internal Oscillator, and

three software selectable power saving modes. Idle mode stops the CPU while allowing the SRAM, Timer/Counter,

ADC, Analog Comparator, and Interrupt system to continue functioning. Power-down mode saves the register con-

tents, disabling all chip functions until the next Interrupt or Hardware Reset. ADC Noise Reduction mode stops the

CPU and all I/O modules except ADC, to minimize switching noise during ADC conversions.

The device is manufactured using Atmel’s high density non-volatile memory technology. The On-chip ISP Flash

allows the Program memory to be re-programmed In-System through an SPI serial interface, by a conventional

non-volatile memory programmer or by an On-chip boot code running on the AVR core.

The ATtiny25/45/85 AVR is supported with a full suite of program and system development tools including: C Com-

pilers, Macro Assemblers, Program Debugger/Simulators and Evaluation kits.