DESCRIPTION

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 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.

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