HD66751

 128 *128-dot graphics display LCD controller/driver for four monochrome grayscales
 Fixed display of graphics icons (pictograms)
 16-/8-bit high-speed bus interface capability
 Bit-operation functions for graphics processing incorporated:
    - Write-data mask function in bit units
    - Bit rotation function
    - Bit logic-operation function
 Low-power operation support:
   - Vcc = 1.8 to 3.6 V (low voltage)
   - V_LCD = 5 to 15.5 V (liquid crystal drive voltage)
   - Two-, five-, six-, or seven-times booster for liquid crystal drive voltage
   - 64-step contrast adjuster and voltage followers to decrease direct current flow in the LCD drivebleeder-resistors
   - Power-save functions such as the standby mode and sleep mode supported
   - Programmable drive duty ratios and bias values displayed on LCD
 128-segment *128-common liquid crystal display driver
 n-raster-row AC liquid-crystal drive (C-pattern waveform drive)
 Duty ratio and drive bias (selectable by program)
 Window cursor display supported by hardware
 Vertical smooth scroll
 Partial smooth scroll control (fixed display of graphics icons)
 Vertical double-height display by each display raster-row
 Black-and-white reversed display
 No wait time for instruction execution and RAM access
 Internal oscillation and hardware reset
 Shift change of segment and common driver

The HD66750/1, dot-matrix graphics LCD controller and driver LSI, displays 128-by-128-dot graphicsfor four monochrome grayscales.  Since the HD66750/1 incorporates bit-operation functions and a 16-bithigh-speed bus interface, it enables efficient data transfer and high-speed rewriting of data in the graphicsRAM.  The following functions allow the user to easily see a variety of information: a smooth scrolldisplay function that fixed-displays a part of the graphics icons and perform vertical smooth scrolling of theremaining bit-map areas, a double-height display function, and a hardware-supported window cursordisplay function.

The HD66750/1 has various functions to reduce the power consumption of an LCD system such as low-voltage operation of 1.8 V min., a booster to generate maximum seven-times LCD drive voltage from thesupplied voltage, and voltage-followers to decrease the direct current flow in the LCD drive bleeder-resistors.   Combining these hardware functions with software functions, such as a partial display withlow-duty drive and standby and sleep modes, allows precise power control.   The HD66750/1 is suitablefor any mid-sized or small portable battery-driven product requiring long-term driving capabilities, such asdigital cellular phones supporting a WWW browser, bidirectional pagers, and small PDAs.