DESCRIPTION
The Philips microcontrollers described in this data sheet are high-performance static 80C51 designs. They are manufactured in an advanced CMOS process and contain a non-volatile Flash program memory. They support both 12-clock and 6-clock operation.

FEATURES
•80C51 Central Processing Unit
–4 Kbytes Flash (P89C51X2)
–8 Kbytes Flash (P89C52X2)
–16 Kbytes Flash (P89C54X2)
–32 Kbytes Flash (P89C58X2)
–128 byte RAM (P89C51X2)
–256 byte RAM (P89C52/54X2/58X2)
–Boolean processor
–Fully static 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
•Two speed ranges
–0 to 20 MHz with 6-clock operation
–0 to 33 MHz with 12-clock operation
•LQFP, PLCC or DIP package
•Extended temperature ranges
•Dual Data Pointers
•Three security bits
•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