HD66705U Datasheet PDF - Hitachi Semiconductor
| Part Number | HD66705U | |
| Description | Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver | |
| Manufacturers | Hitachi Semiconductor | |
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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
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HD66705U Block Diagram
HD66705U
OSC1 OSC2 SFT EXM AGND
CPG
RESET*
TEST
IM1/0
RS/CS*
E/SCL
RW/SDA
DB7–DB6
DB5/ID5
–DB0/ID0
System
interface
• Clock-
synchro-
nized
serial
• 4 bits
• 8 bits
Input/
output
buffer
Instruction
register
(IR)
Instruction
decoder
8
7
Address
counter
7
8 Data
register
(DR)
Busy
flag
5
3
8
75
Timing generator
7
Display data RAM
(DDRAM)
60 × 8 bits
ASEG1–
ASEG10
Annunciator
driver
ACOM
COM1–
COM16
18-bit Common
shift signal
register driver
COMS1/2
8
60-bit 60-bit
shift latch
register circuit
SEG1–
Segment SEG60
signal
driver
8
Vci
C1
C2
V5OUT2
V5OUT3
Booster
Segment
RAM
(SEGRAM)
8 bytes
Character
generator
RAM
(CGRAM )
32 bytes
Character
generator
ROM
(CGROM)
9,600 bits
Cursor and
blink
controller
5
5
Parallel/serial converter
LCD drive
voltage
selector
VCC
GND
+–
R
+–
R
+–
R
+–
R
+–
R
VR
OPOFF
V1OUT
V2OUT
V3OUT
V2 V3
V4OUT V5OUT
VEE
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for HD66705U electronic component. |
| Information | Total 70 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ HD66705U.PDF Datasheet ] | |
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Featured Datasheets
| Part Number | Description | MFRS |
| HD66705U | The function is Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver. Hitachi Semiconductor | |
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