AT89C51-20PI Datasheet PDF - ATMEL

Description

●The AT89C51 is a low-power, high-performance CMOS 8-bit microcomputer with 4K bytes of Flash programmable and erasable read only memory (PEROM). The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry-standard MCS-51 instruction set and pinout.

●Features

●• Compatible with MCS-51™ Products

●• 4K Bytes of In-System Reprogrammable Flash Memory

●– Endurance: 1,000 Write/Erase Cycles

●• Fully Static Operation: 0 Hz to 24 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

●• Programmable Serial Channel

●• Low-power Idle and Power-down Modes