HD66712 (LCD-II/F12)
(Dot-Matrix Liquid Crystal Display Controller/Driver)
Description
The HD66712 dot-matrix liquid crystal display
controller and driver LSI displays alphanumerics,
numbers, and symbols. It can be configured to
drive a dot-matrix liquid crystal display under the
control of a serial or a 4- or 8-bit microprocessor.
Since all the functions such as display RAM,
character generator, and liquid crystal driver,
required for driving a dot-matrix liquid crystal
display are internally provided on one chip, a
minimum system can be interfaced with this con-
troller/driver.
A single HD66712 is capable of displaying a single
24-character line, two 24-character lines, or four
12-character lines.
The HD66712 software is upwardly compatible
with the LCDII (HD44780) which allows the user
to easily replace an LCD-II with an HD66712. In
addition, the HD66712 is equipped with functions
such as segment displays for icon marks, a 4-line
display mode, and a horizontal smooth scroll, and
thus supports various display forms. This achieves
various display forms. The HD66712 character
generator ROM is extended to generate 240 5
×
8
dot characters.
The low-voltage operation (2.7 V) of the HD66712,
combined with a low-power mode, is suitable for
any portable battery-driven product requiring low
power consumption.
• Low-power operation support:
— 2.7 to 5.5 V (low voltage)
— Wide liquid-crystal voltage range: 3.0 to
13.0 V max.
• Booster for liquid crystal voltage
— Two/three times (13 V max.)
• High-speed MPU bus interface
(2MHz at 5-V operation)
• Extension driver interface
• Character display and independent 60-icon mark
display possible
• Horizontal smooth scroll by 6-dot font width
display possible
• 80
×
8-bit display RAM (80 characters max.)
• 9,600-bit character generator ROM
— 240 characters (5
×
8 dot)
• 64
×
8-bit character generator RAM
— 8 characters (5
×
8 dot)
• 16
×
8-bit segment icon mark
— 96-segment icon mark
• 34-common
×
60-segment liquid crystal display
driver
• Programmable duty cycle
(See list 1)
• Software upwardly compatible with HD44780
• Wide range of instruction functions:
— Functions compatible with LCD-II: Display
clear, cursor home, display on/off, cursor
on/off, display character blink, cursor shift,
display shift
— Additional functions: Icon mark control, 4-
line display, horizontal smooth scroll, 6-dot
character width control, white-black invert-
ing blinking cursor
• Automatic reset circuit that initializes the con-
troller/driver after power on (standard version
only)
Features
• 5
×
8 dot matrix possible
• Clock-synchronized serial interface capability; can
interface with 4- or 8-bit MPU
模拟与混合信号
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
