HD66740 Datasheet, PDF (1/95 Pages) Hitachi Semiconductor – 112 x 80-dot Graphics LCD Controller/Driver

HD66740
HD66740
(112 x 80-dot Graphics LCD Controller/Driver)
Rev 1.0
August, 2001
Description
The HD66740, 112-by-80 dot-matrix graphics LCD controller and driver LSI, displays graphics such as
text, kanji and pictograms. It can be configured to drive a dot-matrix liquid crystal under the control of the
microprocessor connected via the clock-synchronized serial or 4/8-bit bus. The HD66740 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 HD66740 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 five-times LCD drive voltage from the
supplied 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 standby and sleep modes
allows fine power control. The HD66740 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 graphics LCD
• 112 x 80-dot display
• Fixed display of graphics icons (pictograms)
• Low-power operation support:
 Vcc = 1.8 to 3.6 V (low voltage)
 V_LCD = 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
 Programmable drive duty ratios and bias values displayed on LCD
• High-speed clock-synchronized serial interface (serial transfer rate: 5 MHz max.)
• I2C bus interface
• High-speed 4-/8-bit bus interface capability
• 112-segment × 80-common liquid crystal display driver
• 1,120-byte (112 × 80 dots) character generator RAM
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