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DESCRIPTION

The 87L51FA and 87L51FB Single-Chip 3.0V 8-Bit Microcontrollers are manufactured in an advanced CMOS process and are derivatives of the 80C51 microcontroller family. The 87L51FA/B has the same instruction set as the 80C51.

FEATURES

? 80C51 central processing unit

? 3.0 to 4.5V VCC range

? 8k × 8 EPROM (87L51FA) 16k × 8 EPROM (87L51FB)

– 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