ATtiny40 Atmel Corporation, ATtiny40 Datasheet - Page 4

• Manufacturer Part Number: ATtiny40
• Manufacturer: Atmel Corporation

Specifications of ATtiny40

• Flash (kbytes): 4 Kbytes
• Pin Count: 20
• Max. Operating Frequency: 12 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 12
• Hardware Qtouch Acquisition: Yes
• Max I/o Pins: 18
• Ext Interrupts: 18
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 12
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 0.25
• Self Program Memory: NO
• 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: 4
• Input Capture Channels: 1
• Pwm Channels: 2
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

2. Overview
4
ATtiny40
ATtiny40 is a low-power CMOS 8-bit microcontroller based on the compact AVR enhanced
RISC architecture. By executing powerful instructions in a single clock cycle, the ATtiny40
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 16 general purpose working registers and
system registers. All 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.
DATA REGISTER
PORT A
PROGRAMMING
INSTRUCTION
INSTRUCTION
INTERFACE
PROGRAM
DECODER
CONTROL
REGISTER
FLASH
LOGIC
LINES
ISP
Block Diagram
DRIVERS
PORT A
PA[7:0]
V
CC
REG. PORT A
DIRECTION
INTERRUPT
REGISTERS
PROGRAM
COUNTER
GENERAL
PURPOSE
REGISTER
POINTER
STATUS
STACK
SRAM
UNIT
ALU
X
Y
Z
DATA REGISTER
PORT B
DRIVERS
PORT B
PB[3:0]
8-BIT DATA BUS
REG. PORT B
DIRECTION
MCU STATUS
OSCILLATOR
WATCHDOG
RESET FLAG
COUNTER0
COUNTER1
INTERNAL
REGISTER
REGISTER
TIMER/
TIMER/
TIMER
TWI
SPI
DATA REGISTER
PORT C
RESET
DRIVERS
PORT C
PC[5:0]
COMPARATOR
CALIBRATED
OSCILLATOR
TIMING AND
REG. PORT C
CONTROL
DIRECTION
ANALOG
ADC
8263AS–AVR–08/10
GND