HD66726 Datasheet | Hitachi Semiconductor

Description The HD66726, dot-matrix graphics LCD controller and driver LSI incorporating a key scan function up to a 4-by-8 key matrix, 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. A single HD66726 is capable of displaying up to five 16-character lines, 96-by-40 dot graphics and 192 segments. Of the 192 segments displayed, 64 segments can be grayscaled. The HD66726 has a smooth vertical scroll display and double-width display so that the user can easily see a variety of information within a small LCM. The HD66726 has various functions to reduce the power consumption of an LCD system such as lowvoltage operation of 2.2 V or less, a booster to generate maximum quadruple 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 HD66726 is suitable for any portable battery-driven product requiring longterm driving capabilities and small physical dimensions such as cellular phones, pagers, portable audio devices, or electronic wallets.45 Features - Control and drive of a character and graphics LCD with built-in key scan functions - Five 16-character lines, 96-by-40 dot graphics, and 192 segments - 64 grayscale segments - Control up to a 4 × 8 (32 key) matrix key scan. - 3 general ports built-in - Low-power operation support:  Vcc = 2.2 to 5.5 V (low voltage)  VLCD = 4.0 to 13.0 V (liquid crystal drive voltage)  Single, double, triple, or quadruple booster for liquid crystal drive voltage  Contrast adjuster and voltage followers to decrease direct current flow in the LCD drive bleeder-...