Specially designed for Lamp ballast and Motor Control applications, the AT90PWM2B AVR microcontroller features 8 KBytes Flash memory, 7-channel advanced PWM, 8-channel 8-bit ADC, two or three 12-bit High Speed PSC (Power Stage Controllers) with 4-bit Resolution Enhancement and DALI protocol support.
The AT90PWM2/2B/3/3B is a low-power CMOS 8-bit microcontroller based on the AVRenhanced 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.
High Performance, Low Power AVR ? 8-bit MicrocontrollerAdvanced 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 MultiplierData and Non-Volatile Program Memory– 8K Bytes Flash of In-System Programmable Program MemoryEndurance: 10,000 Write/Erase Cycles– Optional Boot Code Section with Independent Lock BitsIn-System Programming by On-chip Boot ProgramTrue Read-While-Write Operation– 512 Bytes of In-System Programmable EEPROMEndurance: 100,000 Write/Erase Cycles– 512 Bytes Internal SRAM– Programming Lock for Flash Program and EEPROM Data SecurityOn Chip Debug Interface (debugWIRE)Peripheral Features– Two or three 12-bit High Speed PSC (Power Stage Controllers) with 4-bitResolution EnhancementNon Overlapping Inverted PWM Output Pins With Flexible Dead-TimeVariable PWM duty Cycle and FrequencySynchronous Update of all PWM RegistersAuto Stop Function for Event Driven PFC ImplementationLess than 25 Hz Step Width at 150 kHz Output FrequencyPSC2 with four Output Pins and Output Matrix– One 8-bit General purpose Timer/Counter with Separate Prescaler and CaptureMode– One 16-bit General purpose Timer/Counter with Separate Prescaler, CompareMode and Capture Mode– Programmable Serial USARTStandard UART mode16/17 bit Biphase Mode for DALI Communications– Master/Slave SPI Serial Interface– 10-bit ADCUp To 11 Single Ended Channels and 2 Fully Differential ADC Channel PairsProgrammable Gain (5x, 10x, 20x, 40x on Differential Channels)Internal Reference Voltage– 10-bit DAC– Two or three Analog Comparator with Resistor-Array to Adjust ComparisonVoltage– 4 External Interrupts– Programmable Watchdog Timer with Separate On-Chip OscillatorSpecial 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)
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