HD66740
(112
脳
80-dot Graphics LCD Controller/Driver)
ADE-207-334(Z)
Rev 1.0
April, 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
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Control and drive of a graphics LCD
112
脳
80-dot display
Fixed display of graphics icons (pictograms)
Low-power operation support:
錚?/div>
Vcc = 1.8 to 3.6 V (low voltage)
錚?/div>
V
LCD
= 4.5 to 15.0 V (liquid crystal drive voltage)
錚?/div>
Triple, quadruple, or five-times booster for liquid crystal drive voltage
錚?/div>
64-step contrast adjuster and voltage followers to decrease direct current flow in the LCD drive
bleeder-resistors
錚?/div>
Power-save functions such as the standby mode and sleep mode supported
錚?/div>
Programmable drive duty ratios and bias values displayed on LCD
鈥?/div>
High-speed clock-synchronized serial interface (serial transfer rate: 5 MHz max.)
鈥?/div>
I2C bus interface
Preliminary: The specifications of this device are subject to change without notice. Please contact your
nearest Hitachi鈥檚 Sales Dept. regarding specifications.
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