描述 Description

Overview The devices are Single-Chip 8-Bit Microcontrollers manufactured in an advanced CMOS process and are derivatives of the 80C51 microcontroller family. The instruction set is 100 pct compatible with the 80C51 instruction set.
The devices support 6-clock/12-clock mode selection by programming an OTP bit (OX2) using parallel programming. In addition, an SFR bit (X2) in the clock control register (CKCON) also selects between 6-clock/12-clock mode.
The devices also have four 8-bit I/O ports, three 16-bit timer/event counters, a multi-source, four-priority-level, nested interrupt structure, an enhanced UART and on-chip oscillator and timing circuits.
The added features of the P8xC654X2 make it a powerful microcontroller for applications that require pulse width modulation, high-speed I/O and up/down counting capabilities such as motor control.

特性 Features

80C51 Central Processing Unit 16 kbytes OTP
256 byte RAM
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

Parallel programming with 87C51 compatible hardware interface to programmer
RAM expandable externally to 64 kbytes
PLCC and LQFP packages
Extended temperature ranges
Dual Data Pointers
Security bits (3 bits)
Encryption array - 64 bytes
Seven interrupt sources
Four interrupt priority levels
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
Watchdog timer