HD66705U Datasheet | Hitachi Semiconductor

Description The HD66705U dot-matrix liquid crystal display controller and driver LSI displays alphanumerics, katakana, hiragana, and symbols. It can be configured to drive a dot-matrix liquid crystal display under the control of a clock-synchronized serial, or a 4- or 8-bit microprocessor. A single HD66705U is capable of displaying a maximum of two 12-character lines, 40 segments, and 10 annunciators. The HD66705U incorporates all the functions required for driving a dot-matrix liquid crystal display such as display RAM, character generator, and liquid crystal drivers, and a booster for LCD power supply. The HD66705U provides various functions to reduce the power consumption of an LCD system such as low-voltage operation of 2.4V or less, a booster for generating a maximum of triple LCD drive voltage from the supplied voltage, and voltage-followers for decreasing the direct current flow in the LCD drive bleeder-resistors. bining these hardware functions with software functions such as standby and sleep modes allows a fine power control. The HD66705U, with the above functions, is suitable for any portable battery-driven product requiring long-term driving capabilities and small size. Features - 5 × 8-dot matrix LCD drive - Two 12-character lines, 40 segments, and 10 annunciators - Low-power operation support:  2.4 to 5.5V (low voltage)  Double or triple booster for liquid crystal drive voltage  Electron volume function and voltage-followers for decreasing the direct current flow in the LCD drive bleeder-resistors  Standby mode and sleep mode  Displays up to 10 static annunciators without LCD power supply - Clock-synchronized serial interface; 4- or 8-bit parallel bus interface - 60 × 8-bit display data RAM (60 characters max) - 9,600-bit character generator ROM .. - 240 characters (5 × 8 dots) - 32 × 5-bit character generator RAM  4 characters (5 × 8 dots) - 8 × 5-bit segment RAM  40 segment-icons and marks max - 60-segment × 34-mon liquid...