Описание
The ATtiny28 is a low-power CMOS 8-bit microcontroller based on the AVR RISC architecture. 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 connected to the Arithmetic Logic Unit (ALU), allowing two independent registers to be accessed in one single instruction executed in one clock cycle. The resulting architecture is more code efficient while achieving throughputs up to ten times faster than conventional CISC microcontrollers.
- Utilizes the AVR® RISC Architecture
- AVR – High-performance and Low-power RISC Architecture
- 90 Powerful Instructions
- Most Single Clock Cycle Execution
- 32 x 8 General-purpose Working Registers
- Up to 4 MIPS Throughput at 4 MHz
- Nonvolatile Program Memory
- 2K Bytes of Flash Program Memory
- Endurance: 1,000 Write/Erase Cycles
- Programming Lock for Flash Program Data Security
- Peripheral Features
- Interrupt and Wake-up on Low-level Input
- One 8-bit Timer/Counter with Separate Prescaler
- On-chip Analog Comparator
- Programmable Watchdog Timer with On-chip Oscillator
- Built-in High-current LED Driver with Programmable Modulation
- Special Microcontroller Features
- Low-power Idle and Power-down Modes
- External and Internal Interrupt Sources
- Power-on Reset Circuit with Programmable Start-up Time
- Internal Calibrated RC Oscillator
- Power Consumption at 1 MHz, 2V, 25°C
- Active: 3.0 am
- Idle Mode: 1.2 am
- Power-down Mode: <1 µA
- I/O and Packages
- 11 Programmable I/O Lines, 8 Input Lines and a High-current LED Driver
- 28-lead PDIP, 32-lead TQFP, and 32-pad MLF
- Operating Voltages
- VCC: 1.8V – 5.5V for the ATtiny28V
- VCC: 2.7V – 5.5V for the ATtiny28L
- Speed Grades
- 0 – 1.2 MHz for the ATtiny28V
- V
- 0 – 4 MHz For the ATtiny28L
