HD66750

Preliminary HD66750/1 (128 x 128-dot Graphics LCD Controller/Driver with Four-grayscale Functions) Rev 0.7 July 26th, 1999 Description The HD66750/1, dot-matrix graphics LCD controller and driver LSI, displays 128-by-128-dot graphics for four monochrome grayscales. Since the HD66750/1 incorporates bit-operation functions and a 16-bit high-speed bus interface, it enables efficient data transfer and high-speed rewriting of data in the graphics RAM. The following functions allow the user to easily see a variety of information: a smooth scroll display function that fixed-displays a part of the graphics icons and perform vertical smooth scrolling of the remaining bit-map areas, a double-height display function, and a hardware-supported window cursor display function. The HD66750/1 has various functions to reduce the power consumption of an LCD system such as lowvoltage operation of 1.8 V min., a booster to generate maximum seven-times LCD drive voltage from the supplied voltage, and voltage-followers to decrease the direct current flow in the LCD drive bleederresistors. Combining these hardware functions with software functions, such as a partial display with low-duty drive and standby and sleep modes, allows precise power control. The HD66750/1 is suitable for any mid-sized or small portable battery-driven product requiring long-term driving capabilities, such as digital cellular phones supporting a WWW browser, bidirectional pagers, and small PDAs. Features ¥ ¥ ¥ ¥ 128 ´ 128...