P80C528EFA

8Bit microcontrollers

GENERAL DESCRIPTION

The P83C524 and P83C528 single-chip 8-bit microcontrollers are manufactured in an advanced CMOS process and are derivatives of the PCB80C51 microcontroller family. These devices provide architectural enhancements that make them applicable in a variety of applications in general control systems, especially in those systems which need a large ROM and RAM capacity on chip.

FEATURES

• 80C51 CPU

• 32 kbytes on-chip ROM, expandable externally to 64 kbytes Program Memory address space

• P83C524:

– 16 kbytes on-chip ROM, expandable externally from 32 kbytes to 64 kbytes Program Memory address space address space 16 k to 32 k not usable

• P80C528:

– ROMless version of P83C528

• P83C528:

– 32 kbytes on-chip ROM, expandable externally from 32 kbytes to 64 kbytes Program Memory address space

• EPROM versions are available: see separate data sheet P87C524 and P87C528

• 512 bytes on-chip RAM, expandable externally to 64 kbytes Data Memory address space

• Four 8-bit I/O ports

• Full-duplex UART compatible with the standard 80C51 and the 8052

• Two standard 16-bit timer/counters

• An additional 16-bit timer functionally equivalent to the timer 2 of the 8052

• On-chip Watchdog Timer WDT with an own oscillator

• Bit-level I2C-bus hardware serial I/O Port

• 7-source and 7-vector interrupt structure with 2 priority levels

• Up to 3 external interrupt request inputs

• Two programmable power reduction modes Idle and Power-down

• Termination of Idle mode by any interrupt, external or WDT watchdog reset

• Wake-up from Power-down by external interrupt, external or WDT reset

• ROM code protection

• XTAL frequency range: 3.5 MHz to 16 MHz and 3.5 MHz to 24 MHz

• All packaging pin-outs fully compatible to the standard 8051/8052.