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Overview

The AT90PWM2/2B/3/3B 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 AT90PWM2/2B/3/3B achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.

Features

? High Performance, Low Power Atmel? AVR? 8-bit Microcontroller

? Advanced RISC Architecture

– 129 Powerful Instructions - Most Single Clock Cycle Execution

– 32 x 8 General Purpose Working Registers

– Fully Static Operation

– Up to 1 MIPS throughput per MHz

– On-chip 2-cycle Multiplier

? Data and Non-Volatile Program Memory

– 8K Bytes Flash of In-System Programmable Program Memory

? Endurance: 10,000 Write/Erase Cycles

– Optional Boot Code Section with Independent Lock Bits

? In-System Programming by On-chip Boot Program

? True Read-While-Write Operation

– 512 Bytes of In-System Programmable EEPROM

? Endurance: 100,000 Write/Erase Cycles

– 512 Bytes Internal SRAM

– Programming Lock for Flash Program and EEPROM Data Security

? On Chip Debug Interface (debugWIRE)

? Peripheral Features

– Two or three 12-bit High Speed PSC (Power Stage Controllers) with 4-bit Resolution Enhancement

? Non Overlapping Inverted PWM Output Pins With Flexible Dead-Time

? Variable PWM duty Cycle and Frequency

? Synchronous Update of all PWM Registers

? Auto Stop Function for Event Driven PFC Implementation

? Less than 25 Hz Step Width at 150 kHz Output Frequency

? PSC2 with four Output Pins and Output Matrix

– One 8-bit General purpose Timer/Counter with Separate Prescaler and Capture Mode

– One 16-bit General purpose Timer/Counter with Separate Prescaler, Compare Mode and Capture Mode

– Programmable Serial USART

? Standard UART mode

? 16/17 bit Biphase Mode for DALI Communications

– Master/Slave SPI Serial Interface

– 10-bit ADC

? Up To 11 Single Ended Channels and 2 Fully Differential ADC Channel Pairs

? Programmable Gain (5x, 10x, 20x, 40x on Differential Channels)

? Internal Reference Voltage

– 10-bit DAC

– Two or three Analog Comparator with Resistor-Array to Adjust Comparison Voltage

– 4 External Interrupts

– Programmable Watchdog Timer with Separate On-Chip Oscillator

? Special Microcontroller Features

– Low Power Idle, Noise Reduction, and Power Down Modes

– Power On Reset and Programmable Brown Out Detection

– Flag Array in Bit-programmable I/O Space (4 bytes)

– In-System Programmable via SPI Port

– Internal Calibrated RC Oscillator ( 8 MHz)

– On-chip PLL for fast PWM ( 32 MHz, 64 MHz) and CPU (16 MHz)

? Operating Voltage: 2.7V - 5.5V

? Extended Operating Temperature:

– -40°C to +105°C