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AT90S4414解密

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    关于AT90S4414单片机:
  The AT90S4414 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 AT90S4414 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.
  The AVR core is based on an enhanced RISC architecture that 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.
  AT90S4414 Features
  AVR? - High Performance and Low Power RISC Architecture
  118 Powerful Instructions - Most Single Clock Cycle Execution
  4K bytes of In-System Reprogrammable Flash
  – SPI Serial Interface for Program Downloading
  – Endurance: 1,000 Write/Erase Cycles
  256 bytes EEPROM
  – Endurance: 100,000 Write/Erase Cycles
  256 bytes Internal SRAM
  32 x 8 General Purpose Working Registers
  32 Programmable I/O Lines
  Programmable Serial UART
  SPI Serial Interface
  VCC: 2.7 - 6.0V
  Fully Static Operation
  – 0 - 8 MHz, 4.0 - 6.0V
  – 0 - 4 MHz, 2.7 - 4.0V
  Up to 8 MIPS Throughput at 8 MHz
  One 8-Bit Timer/Counter with Separate Prescaler
  One 16-Bit Timer/Counter with Separate Prescaler
  and Compare and Capture Modes
  Dual PWM
  External and Internal Interrupt Sources
  Programmable Watchdog Timer with On-Chip Oscillator
  On-Chip Analog Comparator
  Low Power Idle and Power Down Modes
  Programming Lock for Software Security