描述 Description

The AT89S51 is a low-power, high-performance CMOS 8-bit microcontroller with 4K bytes of In-System Programmable Flash memory. The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry-standard 80C51 instruction set and pinout. The on-chip Flash allows the program memory to be reprogrammed in-system or by a conventional nonvolatile memory programmer. By combining a versatile 8-bit CPU with In-System Programmable Flash on a monolithic chip, the Atmel AT89S51 is a powerful microcontroller which provides a highly-flexible and cost-effective solution to many embedded control applications.

特性 Features

? Compatible with MCS?-51 Products

? 4K Bytes of In-System Programmable (ISP) Flash Memory

– Endurance: 10,000 Write/Erase Cycles

? 4.0V to 5.5V Operating Range

? Fully Static Operation: 0 Hz to 33 MHz

? Three-level Program Memory Lock

? 128 x 8-bit Internal RAM

? 32 Programmable I/O Lines

? Two 16-bit Timer/Counters

? Six Interrupt Sources

? Full Duplex UART Serial Channel

? Low-power Idle and Power-down Modes

? Interrupt Recovery from Power-down Mode

? Watchdog Timer

? Dual Data Pointer

? Power-off Flag

? Fast Programming Time

? Flexible ISP Programming (Byte and Page Mode)

? Green (Pb/Halide-free) Packaging Option