ATtiny261 Atmel Corporation, ATtiny261 Datasheet - Page 4

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ATtiny261

Manufacturer Part Number
ATtiny261
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of ATtiny261

Flash (kbytes)
2 Kbytes
Pin Count
20
Max. Operating Frequency
20 MHz
Cpu
8-bit AVR
# Of Touch Channels
4
Hardware Qtouch Acquisition
No
Max I/o Pins
16
Ext Interrupts
16
Usb Speed
No
Usb Interface
No
Spi
1
Twi (i2c)
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
11
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
0.12
Eeprom (bytes)
128
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8 to 5.5
Operating Voltage (vcc)
1.8 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
2
Output Compare Channels
6
Input Capture Channels
1
Pwm Channels
6
32khz Rtc
No
Calibrated Rc Oscillator
Yes

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2. Overview
2.1
4
Block Diagram
ATtiny261/461/861
ATtiny261/461/861 are low-power CMOS 8-bit microcontrollers based on the AVR enhanced
RISC architecture. By executing powerful instructions in a single clock cycle, the
ATtiny261/461/861 achieves throughputs approaching 1 MIPS per MHz allowing the system
designer to optimize power consumption versus processing speed.
Figure 2-1.
The AVR core combines a rich instruction set with 32 general purpose working registers. All 32
registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two independent
registers to be accessed in one single instruction executed in one clock cycle. The resulting
architecture is more code efficient while achieving throughputs up to ten times faster than con-
ventional CISC microcontrollers.
Block Diagram
Timer/Counter0
Generation
PORT B (8)
Watchdog
Watchdog
Oscillator
Oscillator
Circuits /
EEPROM
Timer
Clock
PB[0..7]
USI
Timer/Counter1
POR / BOD &
Supervision
Analog Comp.
PORT A (8)
Power
RESET
Flash
PA[0..7]
3
CPU
debugWIRE
A/D Conv.
PROGRAM
Bandgap
SRAM
Internal
LOGIC
11
RESET
XTAL[1..2]
AVCC
AGND
AREF
2588ES–AVR–08/10

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