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AT89C55WD 101024003 0 ریال موجود است
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_Compatible with MCS®-51 Products

_20K Bytes of Reprogrammable Flash Memory
_Endurance: 10,000 Write/Erase Cycles
_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
_Green (Pb/Halide-free) Packaging Option


The AT89C55WD is a low-power, high-performance CMOS 8-bit microcontroller with 
20K bytes of Flash programmable 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 Flash allows the program memory to be user programmed by a 
conventional nonvolatile memory programmer. By combining a versatile 8-bit CPU 
with Flash on a monolithic chip, the Atmel AT89C55WD is a powerful microcomputer 
which provides a highly flexible and cost effective solution to many embedded control 
The AT89C55WD provides the following standard features: 20K bytes of Flash, 256 
bytes of RAM, 32 I/O lines, three 16-bit timer/counters, a six-vector, two-level interrupt 
architecture, a full-duplex serial port, on-chip oscillator, and clock circuitry. In addition, 
the AT89C55WD is designed with static logic for operation down to zero frequency 
and supports two software selectable power saving modes. The Idle Mode stops the 
CPU while allowing the RAM, timer/counters, serial port, and interrupt system to con-
tinue functioning. The Power-down Mode saves the RAM contents but freezes the 
oscillator, disabling all other chip functions until the next external interrupt or hardware 


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