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GENERAL DESCRIPTION

The 3882 group is the 8-bit microcomputer based on the 740 family core technology.

The 3882 group is designed for Keyboard Controller for the note book PC.

FEATURES

¡ñ Basic machine-language instructions ...................................... 71

¡ñ Minimum instruction execution time .................................. 0.5 ?s

(at 8 MHz oscillation frequency)

¡ñ Memory size

ROM ............................................................................. 20K bytes

RAM ............................................................................ 1024 bytes

¡ñ Programmable input/output ports ............................................ 72

¡ñ Software pull-up transistors ....................................................... 8

¡ñ Interrupts ................................................. 17 sources, 14 vectors

¡ñ Timers ............................................................................. 8-bit ? 4

¡ñ Watchdog timer ............................................................ 16-bit ? 1

¡ñ LPC interface .............................................................. 2 channels

¡ñ Serialized IRQ ................................................................ 3 factors

¡ñ Clock generating circuit ..................................... Built-in 1 circuits

(connect to external ceramic resonator)

¡ñ Power source voltage ................................................ 3.0 to 3.6 V

¡ñ Power dissipation

In high-speed mode ..........................................................20 mW

(at 8 MHz oscillation frequency, at 3.3 V power source voltage)

¡ñ Operating temperature range.................................... ¨C20 to 85¡ãC

APPLICATION

Note book PC