HD66705U
(Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver)
ADE-207-305(Z)
'99.9
Rev. 0.0
Description
The HD66705U dot-matrix liquid crystal display controller and driver LSI displays alphanumerics,
katakana, hiragana, and symbols. It can be configured to drive a dot-matrix liquid crystal display under the
control of a clock-synchronized serial, or a 4- or 8-bit microprocessor. A single HD66705U is capable of
displaying a maximum of two 12-character lines, 40 segments, and 10 annunciators. The HD66705U
incorporates all the functions required for driving a dot-matrix liquid crystal display such as display RAM,
character generator, and liquid crystal drivers, and a booster for LCD power supply.
The HD66705U provides various functions to reduce the power consumption of an LCD system such as
low-voltage operation of 2.4V or less, a booster for generating a maximum of triple LCD drive voltage
from the supplied voltage, and voltage-followers for decreasing the direct current flow in the LCD drive
bleeder-resistors. Combining these hardware functions with software functions such as standby and sleep
modes allows a fine power control. The HD66705U, with the above functions, is suitable for any portable
battery-driven product requiring long-term driving capabilities and small size.
Features
•
5
×
8-dot matrix LCD drive
•
Two 12-character lines, 40 segments, and 10 annunciators
•
Low-power operation support:
2.4 to 5.5V (low voltage)
Double or triple booster for liquid crystal drive voltage
Electron volume function and voltage-followers for decreasing the direct current flow in the LCD
drive bleeder-resistors
Standby mode and sleep mode
Displays up to 10 static annunciators without LCD power supply
•
Clock-synchronized serial interface; 4- or 8-bit parallel bus interface
•
60
×
8-bit display data RAM (60 characters max)
•
9,600-bit character generator ROM
1
HD66705U
•
240 characters (5
×
8 dots)
•
32
×
5-bit character generator RAM
4 characters (5
×
8 dots)
•
8
×
5-bit segment RAM
40 segment-icons and marks max
•
60-segment
×
34-common liquid crystal display driver
•
Programmable display sizes and duty ratios (see List1)
•
Vertical smooth scroll
•
Double-height display
•
Wide range of instruction functions:
Display clear, display on/off, icon and mark control, character blink, white-black inverting blinking
cursor, icon and mark blink, cursor home, cursor on/off, white-black inverting raster-row
•
Hardware reset
•
Internal oscillation with an external resistor
•
Wide range of LCD drive voltages
3.0V to 9.0V
•
Slim chip with Au-bump (for COG) and tape carrier package (TCP)
List 1
Programmable Display Sizes and Duty Ratios and Current Consumption
Oscillation
Frequency
40 kHz
85 kHz
Current Consumption
(Normal) (Sleep) (Standby)
Display Size
1 line
×
12
characters
2 lines
×
12
characters
Duty Ratio
1/10
1/18
Multi-plexed-Drive Static-Drive
Segments
Annunciators
40
40
10
10
8
µA
15
µA
6
µA
12
µA
0.1
µA
0.1µA
Note: Current consumption excludes that for LCD power supply source; V
CC
= 3V.
List 2
Type Name
Ordering Information
External Dimensin
TCP
Au-bumped chip
Operation Voltage
2.4V to 5.5V
Internal Font
Japanese and European fonts
HD66705UA03TA0
HCD66705UA03BP
2
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
