Описание
The AVR core combines a rich instruction set with 32 general purpose working registers. All 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. The ATtiny25 provides the following features: 2/4/8K bytes of In-System Programmable Flash, 128/256/512 bytes EEPROM, 128/256/256 bytes SRAM, 6 general purpose I/O lines, 32 general purpose working registers, one 8-bit Timer/Counter with compare modes, one 8-bit high speed Timer/Counter, Universal Serial Interface, Internal and External Interrupts, a 4-channel, 10-bit ADC, a programmable Watchdog Timer with internal Oscillator, and three software selectable power saving modes. Idle mode stops the CPU while allowing the SRAM, Timer/Counter, ADC, Analog Comparator, and Interrupt system to continue functioning. Power-down mode saves the register contents, disabling all chip functions until the next Interrupt or Hardware Reset. ADC Noise Reduction mode stops the CPU and all I/O modules except ADC, to minimize switching noise during ADC conversions. The device is manufactured using Microchip’s high density non-volatile memory technology. The On-chip ISP Flash allows the Program memory to be re-programmed In-System through an SPI serial interface, by a conventional non-volatile memory programmer or by an On-chip boot code running on the AVR core. The ATtiny25 AVR is supported with a full suite of program and system development tools including: C Compilers, Macro Assemblers, Program Debugger/Simulators and Evaluation kits.
- High Performance, Low Power AVR® 8-Bit Microcontroller
- Advanced RISC Architecture
- 120 Powerful Instructions –Most Single Clock Cycle Execution
- 32 x 8 General Purpose Working Registers
- Fully Static Operation
- Non-volatile Program and Data Memories
- 2/4/8K Bytes of In-System Programmable Program Memory Flash
- Endurance: 10,000 Write/Erase Cycles
- 128/256/512 Bytes In-System Programmable EEPROM
- Endurance: 100,000 Write/Erase Cycles
- 128/256/512 Bytes Internal SRAM
- Programming Lock for Self-Programming Flash Program and EEPROM Data Security
- Peripheral Features
- 8-bit Timer/Counter with Prescaler and Two PWM Channels
- 8-bit High Speed Timer/Counter with Separate Prescaler
- 2 High Frequency PWM Outputs with Separate Output Compare Registers
- Programmable Dead Time Generator
- USI –Universal Serial Interface with Start Condition Detector
- 10-bit ADC
- 4 Single Ended Channels
- 2 Differential ADC Channel Pairs with Programmable Gain (1x, 20x)
- Temperature Measurement
- Programmable Watchdog Timer with Separate On-chip Oscillator
- On-chip Analog Comparator
- Special Microcontroller Features
- debugWIRE On-chip Debug System
- In-System Programmable via SPI Port
- External and Internal Interrupt Sources
- Low Power Idle, ADC Noise Reduction, and Power-down Modes
- Enhanced Power-on Reset Circuit
- Programmable Brown-out Detection Circuit
- Internal Calibrated Oscillator
- I/O and Packages
- Six Programmable I/O Lines
- 8-pin PDIP, 8-pin SOIC, 20-pad QFN/MLF, and 8-pin TSSOP (only ATtiny45/V)
- Operating Voltage
- 1.8 – 5.5V for ATtiny25V/45V/85V
- 2.7 – 5.5V for ATtiny25/45/85
- Speed Grade
- ATtiny25V/45V/85V: 0 –4 MHz @ 1.8 – 5.5V, 0 – 10 MHz @ 2.7 – 5.5V
- ATtiny25/45/85: 0 –10 MHz @ 2.7 – 5.5V, 0 – 20 MHz @ 4.5 – 5.5V
- Industrial Temperature Range
- Low Power Consumption
- Active Mode:
- 1 MHz, 1.8V: 300 µA
- Power-down Mode:
- 0.1 µA at 1.8V
