ATMEGA1284P解密

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    关于ATMEGA1284P单片机：
    The ATmega1284P 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 ATmega1284P achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.
　　ATMEGA1284P Features
　　High-performance, Low-power AVR 8-bit Microcontroller
　　Advanced RISC Architecture
　　– 131 Powerful Instructions – Most Single-clock Cycle Execution
　　– 32 x 8 General Purpose Working Registers
　　– Fully Static Operation
　　– Up to 20 MIPS Throughput at 20 MHz
　　– On-chip 2-cycle Multiplier
　　Nonvolatile Program and Data Memories
　　– 128K Bytes of In-System Self-Programmable Flash Endurance: 10,000 Write/Erase Cycles
　　– Optional Boot Code Section with Independent Lock Bits In-System Programming by On-chip Boot Program True Read-While-Write Operation
　　– 4K Bytes EEPROM Endurance: 100,000 Write/Erase Cycles
　　– 16K Bytes Internal SRAM
　　– 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
　　– Two 8-bit Timer/Counters with Separate Prescalers and Compare Modes
　　– Two 16-bit Timer/Counter with Separate Prescaler, Compare 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
　　– Two Programmable Serial USART
　　– Master/Slave SPI Serial Interface
　　– 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 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 Lines
　　– 40-pin PDIP, 44-lead TQFP, and 44-pad QFN/MLF
　　Operating Voltages
　　– 1.8 - 5.5V for ATmega1284P
　　Speed Grades
　　– 0 - 4 MHz @ 1.8 - 5.5V
　　– 0 - 10 MHz @ 2.7 - 5.5V
　　– 0 - 20 MHz @ 4.5 - 5.5V
　　Power Consumption at 1 MHz, 1.8V, 25°C
　　– Active: TBD μA
　　– Power-down Mode: TBD μA
　　– Power-save Mode: TBD μA (Including 32 kHz RTC)