HD66728 Datasheet | Hitachi Semiconductor

Description The HD66728, 112-by-80 dot-matrix graphics LCD controller and driver LSI, displays characters such as alphanumerics, katakana, hiragana and symbols as well as graphics such as kanji and pictograms. It can be configured to drive a dot-matrix liquid crystal display and control key scan functions under the control of the microprocessor connected via the clock-synchronized serial or 4/8-bit bus. The HD66728 has a smooth vertical scroll display and a double-height display for the remaining bit map areas. It fixed-displays a part of the graphics icons so that the user can easily see a variety of information. The HD66728 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 five-times LCD drive voltage from the supplied voltage, and voltage-followers to decrease the direct current flow in the LCD drive bleederresistors. bining these hardware functions with software functions such as standby and sleep modes allows fine power control. The HD66728 is suitable for any portable battery-driven product requiring long-term driving capabilities such as cellular phones, pagers, or electronic wallets. Features - Control and drive of a character and graphics LCD - 112 x 80-dot graphics and 16-character x 10-line display - bined display (superimposed display) of graphics and characters - Fixed display of graphics icons (pictograms) - Control up to a 4 × 8 (32-key) matrix key scan. - 3 general ports built-in - Low-power operation support:  Vcc = 1.8 to 5.5 V (low voltage)  VLCD = 4.5 to 15.0 V (liquid crystal drive voltage)  Triple, quadruple, or five-times booster for liquid crystal drive voltage  64-step contrast adjuster and voltage followers to decrease direct current flow in the LCD drive bleeder-resistors  Power-save functions such as the standby mode and sleep mode supported  Wake-up feature using key scan interrupt  Programmable drive duty ratios and bias...