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AT87F55解密——ATMEL单片机解密

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  AT87F55 Description
The AT87F55WD is a low-power, high-performance CMOS 8-bit microcomputer with 20K bytes of QuickFlash one-time programmable (OTP) read only memory and 256 bytes of RAM. The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry standard 80C51 and 80C52 instruction set and pinout. The on-chip QuickFlash allows the program memory to be user programmed by a conventional nonvolatile memory programmer. By combining a versatile 8-bit CPU with QuickFlash on a monolithic chip, the Atmel AT87F55WD is a powerful microcomputer which provides a highly-flexible and cost-effective solution to many embedded control applications.
AT87F55 Features
  Compatible with MCS-51? Products
  20K Bytes of One-time Programmable QuickFlash Memory
  4V to 5.5V Operating Range
  Fully Static Operation: 0 Hz to 33 MHz
  Three-level Program Memory Lock
  256 x 8-bit Internal RAM
  32 Programmable I/O Lines
  Three 16-bit Timer/Counters
  Eight Interrupt Sources
  Programmable Serial Channel
  Low-power Idle and Power-down Modes
  Interrupt Recovery from Power-down Mode
  Hardware Watchdog Timer
  Dual Data Pointer
  Power-off Flag