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