The ATmega164A/PA/324A/PA/644A/PA/1284/P is a low power, CMOS 8-bit microcontrollers based on the AVR® enhanced RISC architecture. The ATmega164A/PA/324A/PA/644A/PA/1284/P is a 40/49-pins device ranging from 16 KB to 128 KB Flash, with 1 KB to 16 KB SRAM, 512 Bytes to 4 KB EEPROM. By executing instructions in a single clock cycle, the devices achieve CPU throughput approaching one million instructions per second (MIPS) per megahertz, allowing the system designer to optimize power consumption versus processing speed.

Features:

• High-performance, low-power 8-bit AVR® Microcontroller
• Advanced RISC architecture
  • 131 powerful Instructions – most single-clock cycle execution
  • 32 × 8 general purpose working registers
  • Fully static operation
  • Up to 20MIPS throughput at 20MHz
  • On-chip 2-cycle multiplier
  • High endurance non-volatile memory segments
  • 16/32/64/128KBytes of In-System Self-programmable Flash program memory
  • 512/1K/2K/4KBytes EEPROM
  • 1/2/4/16KBytes Internal SRAM
  • Write/Erase Cycles: 10,000 Flash/ 100,000 EEPROM
  • Data retention: 20 years at 85°C/ 100 years at 25°C(1)
  • Optional Boot Code Section with Independent Lock Bits
    • In-System Programming by On-chip Boot Program
    • True Read-While-Write Operation
  • Programming Lock for Software Security
• QTouch® Library Support
  • Capacitive touch buttons, sliders and wheels
  • QTouch and QMatrix™ acquisition
  • Up to 64 sense channels
• JTAG (IEEE std. 1149.1 Compliant) Interface
  • Boundary-scan Capabilities According to the JTAG Standard
  • Extensive On-chip Debug Support
  • Programming of Flash, EEPROM, Fuses, and Lock Bits through the JTAG Interface
• Peripheral Features
  • Two 8-bit Timer/Counters with Separate Prescalers and Compare Modes
  • One/two 16-bit Timer/Counter with Separate Prescaler, Compare Mode, and Capture Mode
  • Real Time Counter with Separate Oscillator
  • Six PWM Channels
  • 8-channel, 10-bit ADC
    • Differential mode with selectable gain at 1×, 10× or 200×
  • Byte-oriented Two-wire Serial Interface
  • Two Programmable Serial USART
  • Master/Slave SPI Serial Interface
  • Programmable Watchdog Timer with Separate On-chip Oscillator
  • On-chip Analog Comparator
  • Interrupt and Wake-up on Pin Change
• Special Microcontroller Features
  • Power-on Reset and Programmable Brown-out Detection
  • Internal Calibrated RC Oscillator
  • External and Internal Interrupt Sources
  • Six Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, Standby and Extended Standby
• I/O and Packages
  • 32 Programmable I/O Lines
  • 40-pin PDIP, 44-lead TQFP, 44-pad VQFN/QFN/MLF
  • 44-pad DRQFN
  • 49-ball VFBGA
• Operating Voltages
  • 1.8 - 5.5V
• Speed Grades
  • 0 - 4MHz @ 1.8 - 5.5V
  • 0 - 10MHz @ 2.7 - 5.5V
  • 0 - 20MHz @ 4.5 - 5.5V
• Power Consumption at 1MHz, 1.8V, 25C
  • Active: 0.4mA
  • Power-down Mode: 0.1µA
  • Power-save Mode: 0.6µA (Including 32kHz RTC)