DESCRIPTION

The 8XC528 single-chip 8-bit microcontroller is manufactured in an advanced CMOS process and is a derivative of the 80C51 microcontroller family. The 8XC528 has the same instruction set as the 80C51. Three versions of the derivative exist:

?83C528 — 32k bytes mask programmable ROM

?80C528 — ROMless version of the 83C528

?87C528 — 32k bytes EPROM (described in a separate data sheet)

FEATURES

?80C51 instruction set

–32k ×8 ROM (83C528)

–ROMless (80C528)

–512 ×8 RAM

–Memory addressing capability 64k ROM and 64k RAM

–Three 16-bit counter/timers

–On-chip watchdog timer with oscillator

–Full duplex UART

–I2C serial interface

–Four 8-bit I/O ports

?Power control modes:

–Idle mode

–Power-down mode

–Warm start from power-down

?CMOS and TTL compatible

?Extended temperature ranges

?ROM code protection

?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

?XTAL frequency range: 1.2 MHz to 16 MHz