DESCRIPTION

The 87C552 Single-Chip 8-Bit Microcontroller is manufactured in an advanced CMOS process and is a derivative of the 80C51 microcontroller family. The 87C552 has the same instruction set as the 80C51.

FEATURES

• 80C51 central processing unit

• 8k × 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

• 256 × 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: 2.7V to 5.5V (0 to 16MHz)

• Security bits:

– OTP/EPROM – 3 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