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ATTINY28L Datasheet(PDF) 2 Page - ATMEL Corporation |
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ATTINY28L Datasheet(HTML) 2 Page - ATMEL Corporation |
2 / 81 page 2 ATtiny28L/V 1062F–AVR–07/06 Description The ATtiny28 is a low-power CMOS 8-bit microcontroller based on the AVR RISC archi- tecture. By executing powerful instructions in a single clock cycle, the ATtiny28 achieves throughputs approaching 1 MIPS per MHz, allowing the system designer to optimize power consumption versus processing speed. The AVR core combines a rich instruction set with 32 general-purpose working registers. All the 32 registers are directly con- nected to the Arithmetic Logic Unit (ALU), allowing two independent registers to be accessed in one single instruction executed in one clock cycle. The resulting architec- ture is more code efficient while achieving throughputs up to ten times faster than conventional CISC microcontrollers. Block Diagram Figure 1. The ATtiny28 Block Diagram The ATtiny28 provides the following features: 2K bytes of Flash, 11 general-purpose I/O lines, 8 input lines, a high-current LED driver, 32 general-purpose working registers, an 8-bit timer/counter, internal and external interrupts, programmable Watchdog Timer with internal oscillator and 2 software-selectable power-saving modes. The Idle Mode stops the CPU while allowing the timer/counter and interrupt system to continue functioning. The Power-down mode saves the register contents but freezes the oscillator, disabling all other chip functions until the next interrupt or hardware reset. The wake-up or inter- PROGRAM COUNTER INTERNAL OSCILLATOR WATCHDOG TIMER STACK POINTER PROGRAM FLASH MCU CONTROL REGISTER GENERAL PURPOSE REGISTERS INSTRUCTION REGISTER TIMER/ COUNTER INSTRUCTION DECODER DATA REGISTER PORTB PROGRAMMING LOGIC TIMING AND CONTROL INTERRUPT UNIT STATUS REGISTER ALU PORTB VCC GND CONTROL LINES 8-BIT DATA BUS Z OSCILLATOR PORTD DATA REGISTER PORTA PORTA PORTA CONTROL REGISTER XTAL2 XTAL1 RESET HARDWARE STACK DATA REGISTER PORTD DATA DIR REG. PORTD HARDWARE MODULATOR INTERNAL CALIBRATED OSCILLATOR |
Similar Part No. - ATTINY28L_14 |
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Similar Description - ATTINY28L_14 |
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