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Features High-performance, Low-power AVR 8-bit Microcontroller Advanced RISC Architecture - 131 Powerful Instructions - Most Single Clock Cycle Execution - 32 x 8 General Purpose Working Registers - Up to 6 MIPS Throughput at 16MHz - Fully Static Operation - On-chip 2-cycle Multiplier Nonvolatile Program and Data Memories - 16k Bytes of In-System Self-Programmable Flash - Optional Boot Code Section with Independent Lock Bits - 512K Bytes EEPROM - Programming Lock for Software Security 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 JAGS Interface Peripheral Features - On-chip Analog Comparator - Programmable Watchdog Timer with Seperate On-chip Oscillator - Master/Slave SPI Serial Interface - Two 8-bit Timer/Counters with Separate Prescalar, Compare - One 16-bit TImer/Counter with Seperate Prescaler, Compare and Capture mode - Real TIme Counter with Seperate Oscillator - Four PWM Channels - 8-channel, 10-bit ADC - Byte-oriented Two-wire Serial Interface - Programmable Serial USART Special Mircocontroller 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, and 44-pad MLF Operating Voltages - 4.5-5.5V for ATmega16 Speed Grades - 0-16 MHz for ATmega16 Power Consumption at 4 Mhz, 3V, 35 °C - Active: 1.1mA - Idle Mode: 0.35mA - Power-down Mode: < 1µA

Pin Description Pin Number Description 1 (XCK/T0) PB0 2 (T1) PB1 3 (INT2/AIN0) PB2 4 (OC0/AIN1) PB3 5 (SS) PB4 6 (MOSI) PB5 7 (MISO) PB6 8 (SCK) PB7 9 RESET 10 VCC 11 GND 12 XTAL2 13 XTAL1 14 (RXD) PD0 15 (TXD) PD1 16 (INT0) PD2 17 (INT1) PD3 18 (OC1B) PD4 19 (OC1A) PD5 20 (ICP1) PD6 21 (OC2) PD7 22 (SCL) PC0 23 (SDA) PC1 24 (TCK) PC2 25 (TMS) PC3 26 (TDO) PC4 27 PC5 (TDI) 28 PC6 (TOSC1) 29 PC7 (TOSC2) 30 AVCC 31 GND 32 AREF 33 PA7 (ADC7) 34 PA6 (ADC6) 35 PA5 (ADC5) 36 PA4 (ADC4) 37 PA3 (ADC3) 38 PA2 (ADC2) 39 PA1 (ADC1) 40 PA0 (ADC0)

Pin Layout Dimensional Drawing

Technical Data Data Sheet Atmel - Data Sheet for ATMega16 Application Notes Atmel - AVR Application Notes