ATMEGA644
ATMEGA644 is 8-bit Microcontroller manufactured by Atmel.
Features
- High-performance, Low-power Atmel® AVR® 8-bit Microcontroller
- Advanced RISC Architecture
- 131 Powerful Instructions
- Most Single-clock Cycle Execution
- 32 × 8 General Purpose Working Registers
- Fully Static Operation
- Up to 20 MIPS Throughput at 20MHz
- High Endurance Non-volatile Memory segments
- 64 Kbytes of In-System Self-programmable Flash program memory
- 2 Kbytes EEPROM
- 4 Kbytes Internal SRAM
- Write/Erase cyles: 10,000 Flash/100,000 EEPROM(1)(3)
- Data retention: 20 years at 85°C/100 years at 25°C(2)(3)
- 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 pliant) 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
- Two 8-bit Timer/Counters with Separate Prescalers and pare Modes
- One 16-bit Timer/Counter with Separate Prescaler, pare Mode, and Capture Mode
- Real Time Counter with Separate Oscillator
- Six PWM Channels
- 8-channel, 10-bit ADC Differential mode with selectable gain at 1x, 10x or 200x
- Byte-oriented Two-wire Serial Interface
- One Programmable Serial USART
- Master/Slave SPI Serial Interface
- Programmable Watchdog Timer with Separate On-chip Oscillator
- On-chip Analog parator
- Interrupt and Wake-up on Pin Change
- Special Microcontroller Features
- Power-on Reset and Programmable Brown-out Detection
- Internal Calibrated RC Oscillator
- External and Internal Interrupt Sources
- Six Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, Standby and Extended Standby
- I/O and Packages
- 32 Programmable I/O...
