P80C31中文资料80C51 8-bit microcontroller family 128/256 byte RAM ROMless low voltage (2.7 V-5.5 V), low power, high speed (33 MHz)数据手册恩XP规格书

描述 Description

The Philips 80C31/32 is a high-performance static 80C51 design fabricated with Philips high-density CMOS technology with operation from 2.7 V to 5.5 V.

The 80C31/32 ROMless devices contain a 128 ? 8 RAM/256 ? 8 RAM, 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 device is a low power static design which offers 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 and then the execution resumed from the point the clock was stopped.

特性 Features

• 8051 Central Processing Unit
• Memory addressing capability
• Power control modes:
• CMOS and TTL compatible
• Three package styles
• Dual Data Pointers
• 6 interrupt sources
• Full–duplex enhanced UART
• Programmable clock out
• Low EMI (inhibit ALE)
• Wake-up from Power Down by an external interrupt