Overview
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.
Features
• High Performance, Low Power AVR® 8-Bit Microcontroller
• Advanced RISC Architecture
– 54 Powerful Instructions – Most Single Clock Cycle Execution
– 16 x 8 General Purpose Working Registers
– Fully Static Operation
– Up to 12 MIPS Throughput at 12 MHz
• Non-volatile Program and Data Memories
– 4K Bytes of In-System Programmable Flash Program Memory
– 256 Bytes Internal SRAM
– Flash Write/Erase Cycles: 10,000
– Data Retention: 20 Years at 85oC / 100 Years at 25oC
• Peripheral Features
– One 8-bit Timer/Counter with Two PWM Channels
– One 8/16-bit Timer/Counter
– 10-bit Analog to Digital Converter
• 12 Single-Ended Channels
– Programmable Watchdog Timer with Separate On-chip Oscillator
– On-chip Analog Comparator
– Master/Slave SPI Serial Interface
– Slave TWI Serial Interface
• Special Microcontroller Features
– In-System Programmable
– External and Internal Interrupt Sources
– Low Power Idle, ADC Noise Reduction, Stand-by and Power-down
Modes
– Enhanced Power-on Reset Circuit
– Internal Calibrated Oscillator
• I/O and Packages
– 20-pin SOIC/TSSOP: 18 Programmable I/O Lines
– 20-pad VQFN/MLF: 18 Programmable I/O Lines
• Operating Voltage:
– 1.8 – 5.5V
• Programming Voltage:
– 5V
• Speed Grade
– 0 – 4 MHz @ 1.8 – 5.5V
– 0 – 8 MHz @ 2.7 – 5.5V
– 0 – 12 MHz @ 4.5 – 5.5V
• Industrial Temperature Range
• Low Power Consumption
– Active Mode:
• 200 µA at 1 MHz and 1.8V
– Idle Mode:
• 25 µA at 1 MHz and 1.8V
– Power-down Mode:
• < 0.1 µA at 1.8V
