HD66740 Datasheet PDF - Hitachi Semiconductor
| Part Number | HD66740 | |
| Description | 112 x 80-dot Graphics LCD Controller/Driver | |
| Manufacturers | Hitachi Semiconductor | |
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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)
VLCD = 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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HD66740 Block Diagram
RESET*
TEST
Instruction register
(IR)
OSC1 OSC2
CPG
Instruction
decoder
Timing generator
HD66740
8
IM2-1
IM0/ID
CS*
RS
E/WR*/SCL
RW/RD*/SDA
DB0-DB7
System
interface
- Clock
synchro-
nized
serial
8 Data
- I2C bus
register
- 4-bit bus
(DR)
- 8-bit bus
Address
counter
(AC)
8
10
80-bit bidirectional
common shift register
Common
driver
COM1/80—
COM80/1
112-bit
segment
shift
112-bit
latch
circuit
SEG1/112—
Segment SEG112/1
driver
register
Vci
C1+
C1-
C2+
C2-
C3+
C3-
C4+
C4-
VLOUT
Vcc
VTEST1—
VTEST3
VLCD
Triple to
five-times
booster
Character
generator RAM
(CGRAM)
1,120 bytes
8
Parallel/serial converter
Contrast adjuster
Drive bias controller
+-
VR
+-
R
+-
R
+-
R0
+-
R
OPOFF
V1OUT
V2OUT V3OUT V4OUT V5OUT GND
LCD drive
voltage
selector
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for HD66740 electronic component. |
| Information | Total 30 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ HD66740.PDF Datasheet ] | |
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Featured Datasheets
| Part Number | Description | MFRS |
| HD66740 | The function is 112 x 80-dot Graphics LCD Controller/Driver. Hitachi Semiconductor | |
| HD66741 | The function is 128 x 128-dot Graphics LCD Controller/Driver with Four-grayscale Functions. Hitachi Semiconductor | |
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