Overview
●The ATmega32 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 ATmega32 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power con sumption 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 with Separate 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 ATmega32L
● – 4.5 - 5.5V for ATmega32
●• Speed Grades
● – 0 - 8 MHz for ATmega32L
● – 0 - 16 MHz for ATmega32
●• Power Consumption at 1 MHz, 3V, 25°C for ATmega32L
● – Active: 1.1 mA
● – Idle Mode: 0.35 mA
● – Power-down Mode: < 1 µA
