The Atmel® ATmega128A 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 ATmega128A achieves throughputs close to 1MIPS per MHz. This empowers system designer to optimize the device for power consumption versus processing speed.

Features:

• High-performance, Low-power Atmel AVR 8-bit Microcontroller
• Advanced RISC Architecture
  • 133 Powerful Instructions - Most Single-clock Cycle Execution
  • 32 × 8 General Purpose Working Registers + Peripheral Control Registers
  • Fully Static Operation
  • Up to 16MIPS Throughput at 16MHz
  • On-chip 2-cycle Multiplier
• High Endurance Non-volatile Memory segments
  • 128Kbytes of In-System Self-programmable Flash program memory
  • 4Kbytes EEPROM
  • 4Kbytes 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
  • Up to 64 Kbytes Optional External Memory Space
  • Programming Lock for Software Security
  • SPI Interface for In-System Programming
• 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
• Atmel QTouch® library support
  • Capacitive touch buttons, sliders and wheels
  • Atmel QTouch and QMatrix acquisition
  • Up to 64 sense channels
• Peripheral Features
  • Two 8-bit Timer/Counters with Separate Prescalers and Compare Modes
  • Two Expanded 16-bit Timer/Counters with Separate Prescaler, Compare Mode and Capture Mode
  • Real Time Counter with Separate Oscillator
  • Two 8-bit PWM Channels
  • 6 PWM Channels with Programmable Resolution from 2 to 16 Bits
  • Output Compare Modulator
  • 8-channel, 10-bit ADC
    • 8 Single-ended Channels
    • 7 Differential Channels
    • 2 Differential Channels with Programmable Gain at 1x, 10x, or 200x
  • Byte-oriented Two-wire Serial Interface
  • Dual Programmable Serial USARTs
  • Master/Slave SPI Serial Interface
  • Programmable Watchdog Timer with On-chip Oscillator
  • On-chip Analog Comparator
• 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
  • Software Selectable Clock Frequency
  • ATmega103 Compatibility Mode Selected by a Fuse
  • Global Pull-up Disable
• I/O and Packages
  • 53 Programmable I/O Lines
  • 64-lead TQFP and 64-pad QFN/MLF
• Operating Voltages
  • 2.7 - 5.5V
• Speed Grades
  • 0 - 16MHz