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Portable Information Terminal LSIs

Tsuguji Tachiuchi, Semiconductor & Integrated Circuits Division, Hitachi, Ltd.
Ikuya Kawasaki, Semiconductor & Integrated Circuits Division, Hitachi, Ltd.
Takumi Nishimura, Semiconductor & Integrated Circuits Division, Hitachi, Ltd.

ABSTRACT

The main requirements for portable information terminals are low power consumption, small size and high performance. Hitachi has developed the RISC engine series (SuperH) SH7702/08 (SH-3) for portable information terminals and multimedia terminals.

This family includes a segment driver with frame memory, a liquid crystal display (LCD) driver chip set with a common driver, and a keyboard controller (IKAP) with a power management function.

The SH-3 incorporates high performance (60 MIPS/60 MHz) and low power consumption (600 mW max.) in one chip by using memory management.

Small, high-performance portable information terminals can be constructed using the SH-3, frame memory and the LCD driver chip set, which does not need an external LCD controller.

Hitachi will promote the high frequency version and peripheral module development for SH-3 units, according to requirements.


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