DESCRIPTION

The Philips microcontrollers described in this data sheet are

high-performance static 80C51 designs incorporating Philips’

high-density CMOS technology with operation from 2.7 V to 5.5 V.

They support both 6-clock and 12-clock operation.

The P8xC31X2/51X2 and P8xC32X2/52X2/54X2/58X2 contain

128 byte RAM and 256 byte RAM respectively, 32 I/O lines, three

16-bit counter/timers, a six-source, four-priority level nested interrupt

structure, a serial I/O port for either multi-processor

communications, I/O expansion or full duplex UART, and on-chip

oscillator and clock circuits.

In addition, the devices are low power static designs which offer a

wide range of operating frequencies down to zero. Two software

selectable modes of power reduction — idle mode and power-down

mode — are available. The idle mode freezes the CPU while

allowing the RAM, timers, serial port, and interrupt system to

continue functioning. The power-down mode saves the RAM

contents but freezes the oscillator, causing all other chip functions to

be inoperative. Since the design is static, the clock can be stopped

without loss of user data. Then the execution can be resumed from

the point the clock was stopped.

FEATURES

• 80C51 Central Processing Unit

– 4 kbytes ROM/EPROM (P80/P87C51X2)

– 8 kbytes ROM/EPROM (P80/P87C52X2)

– 16 kbytes ROM/EPROM (P80/P87C54X2)

– 32 kbytes ROM/EPROM (P80/P87C58X2)

– 128 byte RAM (P80/P87C51X2 and P80C31X2)

– 256 byte RAM (P80/P87C52/54X2/58X2 and P80C32X2)

– 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

• PLCC, DIP, TSSOP or LQFP packages

• Extended temperature ranges

• Dual Data Pointers

• Security bits:

– ROM (2 bits)

– OTP (3 bits)

• Encryption array - 64 bytes

• Four interrupt priority levels

• Six interrupt sources

• 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.

P87C51X2属于集成电路（IC） > 微控制器。恩智浦半导体公司制造生产的P87C51X2微控制器微控制器产品是相对复杂的用户可编程数字逻辑器件。这些产品与视为微控制器的器件密切相关，两者之间的区别主要体现在制造商选择的用词。不过按照传统，微控制器集成了工作存储器，也更可能包含混合信号外设，并且往往与更简单的软件范例结合使用，旨在重复执行一系列预定义的任务。