Features
High Performance, Low Power AVR 8-Bit Microcontroller
Advanced RISC Architecture
123 Powerful Instructions Most Single Clock Cycle Execution
32 x 8 General Purpose Working Registers
Fully Static Operation
Non-volatile Program and Data Memories
2/4/8K Byte of In-System Programmable Program Memory Flash
Endurance: 10,000 Write/Erase Cycles
8-bit
128/256/512 Bytes In-System Programmable EEPROM
Endurance: 100,000 Write/Erase Cycles
Microcontroller
128/256/512 Bytes Internal SRAM
Data retention: 20 years at 85C / 100 years at 25 C
with 2/4/8K
Programming Lock for Self-Programming Flash Program & EEPROM Data Security
Peripheral Features
Bytes In-System
8/16-bit Timer/Counter with Prescaler
8/10-bit High Speed Timer/Counter with Separate Prescaler
Programmable
3 High Frequency PWM Outputs with Separate Output Compare Registers
Programmable Dead Time Generator
Flash
10-bit ADC
11 Single-Ended Channels
16 Differential ADC Channel Pairs
ATtiny261/V*
15 Differential ADC Channel Pairs with Programmable Gain (1x, 8x, 20x, 32x)
On-chip Analog Comparator
ATtiny461/V
Programmable Watchdog Timer with Separate On-chip Oscillator
Universal Serial Interface with Start Condition Detector
ATtiny861/V
Special Microcontroller Features
debugWIRE On-chip Debug System
In-System Programmable via SPI Port
Summary
External and Internal Interrupt Sources
Low Power Idle, ADC Noise Reduction, Standby and Power-Down Modes
Enhanced Power-on Reset Circuit
Programmable Brown-out Detection Circuit
*Mature
Internal Calibrated Oscillator
On-chip Temperature Sensor
I/O and Packages
16 Programmable I/O Lines
Available in 20-pin PDIP, 20-pin SOIC and 32-pad MLF
Operating Voltage:
1.8 5.5V for ATtiny261V/461V/861V
2.7 5.5V for ATtiny261/461/861
Speed Grade:
ATtiny261V/461V/861V: 0 4 MHz @ 1.8 5.5V, 0 10 MHz @ 2.7 5.5V
ATtiny261/461/861: 0 10 MHz @ 2.7 5.5V, 0 20 MHz @ 4.5 5.5V
Industrial Temperature Range
Low Power Consumption
Active Mode (1 MHz System Clock): 300 A @ 1.8V
Power-Down Mode: 0.1 A at 1.8V
2588FSAVR06/2013ATtiny261/461/861
1. Pin Configurations
Figure 1-1. Pinout ATtiny261/461/861 and ATtiny261V/461V/861V
PDIP/SOIC
(MOSI/DI/SDA/OC1A/PCINT8) PB0 1 20 PA0 (ADC0/DI/SDA/PCINT0)
(MISO/DO/OC1A/PCINT9) PB1 2 19 PA1 (ADC1/DO/PCINT1)
(SCK/USCK/SCL/OC1B/PCINT10) PB2 3 18 PA2 (ADC2/INT1/USCK/SCL/PCINT2)
(OC1B/PCINT11) PB3 4 17 PA3 (AREF/PCINT3)
VCC 5 16 AGND
GND 6 15 AVCC
(ADC7/OC1D/CLKI/XTAL1/PCINT12) PB4 7 14 PA4 (ADC3/ICP0/PCINT4)
(ADC8/OC1D/CLKO/XTAL2/PCINT13) PB5 8 13 PA5 (ADC4/AIN2/PCINT5)
(ADC9/INT0/T0/PCINT14) PB6 9 12 PA6 (ADC5/AIN0/PCINT6)
(ADC10/RESET/PCINT15) PB7 10 11 PA7 (ADC6/AIN1/PCINT7)
NC NC
1 24
(OC1B/PCINT11) PB3 2 23 PA2 (ADC2/INT1/USCK/SCL/PCINT2)
PA3 (AREF/PCINT3)
NC 3 22
VCC AGND
4 21
QFN/MLF
GND 5 20 NC
NC NC
6 19
(ADC7/OC1D/CLKI/XTAL1/PCINT12) PB4 18 AVCC
7
(ADC8/OC1D/CLKO/XTAL2/PCINT13) PB5 8 17 PA4 (ADC3/ICP0/PCINT4)
Note: To ensure mechanical stability the center pad underneath the QFN/MLF package should be soldered to ground on the board.
2
2588FSAVR06/2013
9 32 PB2 (SCK/USCK/SCL/OC1B/PCINT10)
NC
PB1 (MISO/DO/OC1A/PCINT9)
(ADC9/INT0/T0/PCINT14) PB6 10 31
PB0 (MOSI/DI/SDA/OC1A/PCINT8)
(ADC10/RESET/PCINT15) PB7 11 30
12 29 NC
NC
NC
(ADC6/AIN1/PCINT7) PA7 13 28
14 27 NC
(ADC5/AIN0/PCINT6) PA6
PA0 (ADC0/DI/SDA/PCINT0)
15 26
(ADC4/AIN2/PCINT5) PA5
PA1 (ADC1/DO/PCINT1)
NC 16 25