HD66729 Datasheet | Hitachi Semiconductor

Description The HD66729, 105-by-68 dot-matrix graphics LCD controller and driver LSI, displays graphics. It can be configured to drive a dot-matrix liquid-crystal display under the control of a microprocessor connected via a clock-synchronized serial or 4/8-bit bus. The HD66729 has a partial display mode that selects and drives part of the display area by using a low-duty ratio, a centering display mode that places the LCD drive position at the center of the screen, a smooth vertical-scroll display mode and a double-height display mode for the remaining bit-map areas. It continuously displays several of the graphics icons so that the user can easily access a variety of information. The HD66729 has a booster to generate a quintuple LCD drive voltage from a single 1.8-V power supply and voltage-followers to decrease the direct current flow in the LCD drive bleeder resistors. bining these hardware functions with software functions such as standby and sleep, enables fine power control. The HD66729 is suitable for any portable battery-driven product requiring long-term driving capabilities, including cellular phones, pagers, and electronic wallets. Features - Control and drive of a 105 ´ 68-dot-matrix graphics LCD enabling quintuple power boosting from a single 1.8-V power supply - Partial-display and centering-display modes in which a part of the display area is selected and driven by using a low-duty ratio - Fixed display of several graphics icons (pictograms) at the top of the screen - Low-power operation support: Ñ Vcc = 1.8 to 5.5 V (low voltage) Ñ VLCD = 4.0 to 13.0 V (liquid crystal drive voltage) Ñ Double, triple, quadruple, or quintuple booster for liquid crystal drive voltage Ñ 64-step contrast adjuster and voltage followers to decrease direct current flow in the LCD drive bleeder-resistors Ñ Power-save functions such as the standby mode and sleep mode supported Ñ Programmable drive duty ratios and bias values displayed on LCD - High-speed clock-synchronized...