89C51 Datasheet (PDF) Download
NXP Semiconductors
89C51

Description

The 89C51/89C52/89C54/89C58 contain a non-volatile FLASH program memory that is parallel programmable. For devices that are serial programmable (In System Programmable (ISP) with a boot loader), see the 89C51RC+/89C51RD+ datasheet.

Key Features

  • 80C51 Central Processing Unit
  • On-chip FLASH Program Memory
  • Speed up to 33 MHz
  • Full static operation
  • RAM expandable externally to 64 k bytes
  • 4 level priority interrupt
  • 6 interrupt sources
  • Four 8-bit I/O ports
  • Full-duplex enhanced UART - Framing error detection - Automatic address recognition Multi-Time Programmable (MTP) devices: 89C51 4k 89C52/54/58 8 k/16 k/32 k 89C51RC+ 32 k 89C51RD+ 64 k 1024 Yes Yes 512 Yes Yes 256 No No Serial In-System Programmable devices: 128 No No
  • Power control modes - Clock can be stopped and resumed - Idle mode - Power down mode