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