DESCRIPTION

The 87C51FA and 87C51FB Single-Chip 8-Bit Microcontrollers are manufactured in an advanced CMOS process and are derivatives of the 80C51 microcontroller family. The 87C51FA/FB has the same instruction set as the 80C51.

FEATURES

• 80C51 central processing unit

• 87C51FA: 8k × 8 EPROM

  87C51FB: 16k × 8 EPROM

   – expandable externally to 64k bytes

   – Quick Pulse programming algorithm

   – Two level program security system

• 256 × 8 RAM, expandable externally to 64k bytes

• Three 16-bit timer/counters

   – T2 is an up/down counter

• Programmable Counter Array (PCA)

   – High speed output

   – Capture/compare

   – Pulse Width Modulator

   – Watchdog Timer

• Four 8-bit I/O ports

• Full-duplex enhanced UART

   – Framing error detection

   – Automatic address recognition

• Power control modes

   – Idle mode

   – Power-down mode

• Once (On Circuit Emulation) Mode

• Five package styles

• OTP package available