Описание
The ATmega649 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 ATmega649 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 Microcontroller
- Advanced RISC Architecture
- 130 Powerful Instructions – Most Single Clock Cycle Execution
- 32 x 8 General Purpose Working Registers
- Fully Static Operation
- Up to 16 MIPS Throughput at 16MHz
- On-Chip 2-cycle Multiplier
- High Endurance Non-volatile Memory Segments
- 64KBytes of In-System Self-programmable Flash Program Memory
- 2Kbytes of EEPROM
- 4Kbytes of Internal SRAM
- Write/Erase Cycles: 10,000 Flash/ 100,000 EEPROM
- Data retention: 20 years at 85°C/100 years at 25°C(1)
- Optional Boot Code Section with Independent Lock Bits
- In-System Programming by On-chip Boot Program
- True Read-While-Write Operation
- Programming Lock for Software Security
- JTAG (IEEE std. 1149.1 compliant) Interface
- Boundary-scan Capabilities According to the JTAG Standard
- Extensive On-chip Debug Support
- Programming of Flash, EEPROM, Fuses, and Lock Bits through the JTAG Interface
- Peripheral Features
- 4 x 25 Segment LCD Driver
- Two 8-bit Timer/Counters with Separate Prescaler and Compare Mode
- One 16-bit Timer/Counter with Separate Prescaler, Compare Mode, and Capture Mode
- Real Time Counter with Separate Oscillator
- Four PWM Channels
- 8-channel, 10-bit ADC
- Programmable Serial USART
- Master/Slave SPI Serial Interface
- Universal Serial Interface with Start Condition Detector
- Programmable Watchdog Timer with Separate On-chip Oscillator
- On-chip Analog Comparator
- Interrupt and Wake-up on Pin Change
- Special Microcontroller Features
- Power-on Reset and Programmable Brown-out Detection
- Internal Calibrated Oscillator
- External and Internal Interrupt Sources
- Five Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, and Standby
- I/O and Packages
- 53/68 Programmable I/O Lines
- 64-lead TQFP, 64-pad QFN/MLF, and 100-lead TQFP
- Temperature range:
- -40°C to 85°C Industrial
