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DESCRIPTION

The devices are Single-Chip 8-Bit Microcontrollers manufactured in an advanced CMOS process and are derivatives of the 80C51 microcontroller family. The instruction set is 100 compatible with the 80C51 instruction set.

FEATURES

? 80C51 Central Processing Unit

– 8 kbytes OTP (87C51RA2)

– 16 kbytes OTP (87C51RB2)

– 32 kbytes OTP (87C51RC2)

– 64 kbytes OTP (87C51RD2)

– 512 byte RAM (87C51RA2/RB2/RC2)

– 1 kbyte RAM (87C51RD2)

– Boolean processor

– Fully static operation

– Low voltage (2.7 V to 5.5 V at 16 MHz) operation

? 12-clock operation with selectable 6-clock operation (via software

or via parallel programmer)

? Memory addressing capability

– Up to 64 kbytes ROM and 64 kbytes RAM

? Power control modes:

– Clock can be stopped and resumed

– Idle mode

– Power-down mode

? CMOS and TTL compatible

? Two speed ranges at VCC = 5 V

– 0 to 30 MHz with 6-clock operation

– 0 to 33 MHz with 12-clock operation

? Parallel programming with 87C51 compatible hardware interface

to programmer

? RAM expandable externally to 64 kbytes

? Programmable Counter Array (PCA)

– PWM

– Capture/compare

? PLCC, LQFP, or DIP package

? Extended temperature ranges

? Dual Data Pointers

? Security bits (3 bits)

? Encryption array - 64 bytes

? Seven interrupt sources

? 4 interrupt priority levels

? Four 8-bit I/O ports

? Full-duplex enhanced UART

– Framing error detection

– Automatic address recognition

? Three 16-bit timers/counters T0, T1 (standard 80C51) and

additional T2 (capture and compare)

? Programmable clock-out pin

? Asynchronous port reset

? Low EMI (inhibit ALE, slew rate controlled outputs,

and 6-clock mode)

? Wake-up from Power Down by an external interrupt