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8-bit AVR? Microcontroller with 32K Bytes In-System Programmable Flash

Overview

The ATmega32A 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 ATmega32A 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

– 131 Powerful Instructions – Most Single-clock Cycle Execution

– 32 x 8 General Purpose Working Registers

– Fully Static Operation

– Up to 16 MIPS Throughput at 16 MHz

– On-chip 2-cycle Multiplier

? High Endurance Non-volatile Memory segments

– 32K Bytes of In-System Self-programmable Flash program memory

– 1024 Bytes EEPROM

– 2K Byte 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

? 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 16-bit Timer/Counter with Separate Prescaler, Compare Mode, and Capture Mode

– Real Time Counter withSeparate Oscillator

–Four PWM Channels

– 8-channel, 10-bit ADC

? 8 Single-ended Channels

? 7 Differential Channels in TQFP Package Only

? 2 Differential Channels with Programmable Gain at 1x, 10x, or 200x

– Byte-oriented Two-wire Serial Interface

– Programmable Serial USART

– Master/Slave SPI Serial Interface

– Programmable Watchdog Timer with Separate 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

? I/O and Packages

– 32 Programmable I/O Lines

– 40-pin PDIP, 44-lead TQFP, and 44-pad QFN/MLF

? Operating Voltages

– 2.7 - 5.5V for ATmega32A

? Speed Grades

– 0 - 16 MHz for ATmega32A

? Power Consumption at 1 MHz, 3V, 25°C for ATmega32A

– Active: 0.6 mA

– Idle Mode: 0.2 mA

– Power-down Mode: