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DESCRIPTION

The P89C51RB2/RC2/RD2Hxx device contains a non-volatile 16KB/32KB/64KB Flash program memory that is both parallel programmable and serial In-System and In-Application Programmable. In-System Programming (ISP) allows the user to download new code while the microcontroller sits in the application.

FEATURES

? 80C51 Central Processing Unit

? On-chip Flash Program Memory with In-System Programming (ISP) and In-Application Programming (IAP) capability

? Boot ROM contains low level Flash programming routines for downloading via the UART

? Can be programmed by the end-user application (IAP)

? Parallel programming with 87C51 compatible hardware interface to programmer

? Six clocks per machine cycle operation (standard)

? 12 clocks per machine cycle operation (optional)

? Speed up to 20 MHz with 6 clock cycles per machine cycle (40 MHz equivalent performance); up to 33 MHz with 12 clocks per machine cycle

? Fully static operation

? RAM expandable externally to 64 kbytes

? Four interrupt priority levels

? Seven interrupt sources

? Four 8-bit I/O ports

? Full-duplex enhanced UART

– Framing error detection

– Automatic address recognition

? Power control modes

– Clock can be stopped and resumed

– Idle mode

– Power down mode

? Programmable clock out

? Second DPTR register

? Asynchronous port reset

? Low EMI (inhibit ALE)

? Programmable Counter Array (PCA)

– PWM

– Capture/compare