DESCRIPTION

The P87C554 Single-Chip 8-Bit Microcontroller is manufactured in an advanced CMOS process and is a derivative of the 80C51 microcontroller family. The 87C554 has the same instruction set as the 80C51.

FEATURES

?80C51 central processing unit

?16k ×8 EPROM expandable externally to 64k bytes

?An additional 16-bit timer/counter coupled to four capture registers and three compare registers

?Two standard 16-bit timer/counters

?512 ×8 RAM, expandable externally to 64k bytes

?Capable of producing eight synchronized, timed outputs

?A 10-bit ADC with eight multiplexed analog inputs

?Fast 8-bit ADC option

?Two 8-bit resolution, pulse width modulation outputs

?Five 8-bit I/O ports plus one 8-bit input port shared with analog inputs

?I2C-bus serial I/O port with byte oriented master and slave

functions

?On-chip watchdog timer

?Extended temperature ranges

?Full static operation – 0 to 16 MHz

?Operating voltage range: 2.7 V to 5.5 V (0 to 16 MHz) and 4.5 V to 5.5 V (16 to 33 MHz)

?Three security bits

?Encryption array – 64 bytes

?4 level priority interrupt

?15 interrupt sources

?Full-duplex enhanced UART

– Framing error detection

– Automatic address recognition

?Power control modes

– Clock can be stopped and resumed

– Idle mode

– Power down mode

?Second DPTR register

?ALE inhibit for EMI reduction

?Programmable I/O pins

?Wake-up from power-down by external interrupts

?Software reset

?Power-on detect reset

?ADC charge pump disable

?ONCE mode

?ADC active in Idle mode