Description
The ATtiny87/167 is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATtiny87/167 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.
The AVR core combines a rich instruction set with 32 general purpose working registers. All the 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 conventional CISC microcontrollers.

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
   – 8K/16K Byte of In-System Programmable (ISP) Program Memory Flash Endurance: 10,000 Write/Erase Cycles
   – 512 Bytes In-System Programmable EEPROM Endurance: 100,000 Write/Erase Cycles
   – 512 Bytes Internal SRAM
   – Programming Lock for Self-Programming Flash Program and EEPROM Data Security
   – Low size LIN/UART Software In-System Programmable
• Peripheral Features
   – LIN 2.1 and 1.3 Controller or 8-Bit UART
   – 8-bit Asynchronous Timer/Counter0:
• 10-bit Clock Prescaler
• 1 Output Compare or 8-bit PWM Channel
   – 16-bit Synchronous Timer/Counter1:
• 10-bit Clock Prescaler
• External Event Counter
• 2 Output Compares Units or 16-bit PWM Channels each Driving up to 4 Ouput Pins
   – Master/Slave SPI Serial Interface,
   – Universal Serial Interface (USI) with Start Condition Detector (Master/Slave SPI, TWI, ...)
   – 10-bit ADC:
• 11 Single Ended Channels
• 8 Differential ADC Channel Pairs with Programmable Gain (8x or 20x)
   – On-chip Analog Comparator with Selectable Voltage Reference
   – 100µA ±10% Current Source (LIN Node Identification)
   – On-chip Temperature Sensor
   – Programmable Watchdog Timer with Separate On-chip Oscillator
• Special Microcontroller Features
   – Dynamic Clock Switching (External/Internal RC/Watchdog Clock) for Power Control, EMC Reduction
   – DebugWIRE On-chip Debug (OCD) System
   – Hardware In-System Programmable (ISP) via SPI Port
   – External and Internal Interrupt Sources
   – Interrupt and Wake-up on Pin Change
   – Low Power Idle, ADC Noise Reduction, and Power-down Modes
   – Enhanced Power-on Reset Circuit
   – Programmable Brown-out Detection Circuit
   – Internal Calibrated RC Oscillator 8MHz
   – 4-16 MHz and 32 KHz Crystal/Ceramic Resonator Oscillators
• I/O and Packages
   – 16 Programmable I/O Lines
   – 20-pin SOIC, 32-pad QFN and 20-pin TSSOP
• Operating Voltage:
   – 2.7 - 5.5V for ATtiny87/167
• Speed Grade:
   – 0 - 8 MHz @ 2.7 - 5.5V (Automotive Temp. Range: -40°C to +125°C)
   – 0 - 16 MHz @ 4.5 - 5.5V (Automotive Temp. Range: -40°C to +125°C)