HD66724/HD66725
(Graphics LCD Controller/Driver
with Key Scan Function)
ADE-207-309(Z)
Rev 1.2
'99.8
Description
The HD66724/HD66725, dot-matrix graphics LCD controller and driver LSI incorporating a key scan
function up to a 4-by-8 key matrix, display characters such as alphanumerics, katakana, hiragana and
symbols as well as graphics such as kanji and pictograms. They can be configured to drive a dot-matrix
liquid crystal display and control key scan functions under the control of the microprocessor connected via
the clock-synchronized serial or 4/8-bit bus. The HD66724 is capable of displaying up to three 12-
character lines, 72-by-24 dot graphics and 144 segments. The HD66725 is capable of displaying up to
three 16-character lines, 96-by-24 dot graphics and 192 segments. Of the 144 (192) segments displayed, 48
(64) segments can be grayscaled. The HD66724/HD66725 have a smooth horizontal/vertical scroll display
and double-height display so that the user can easily see a variety of information within a small LCM.
The HD66724/HD66725 have various functions to reduce the power consumption of an LCD system such
as low-voltage operation of 1.8 V or less, a booster to generate maximum triple 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 HD66724/HD66725 are suitable for any portable battery-driven product
requiring long-term driving capabilities and small physical dimensions such as cellular phones, pagers,
portable audio devices, or electronic wallets.
Features
•
•
•
•
•
•
Control and drive of a character and graphics LCD with built-in key scan functions
Three 12- (16-) character lines, 72 (96) -by-24 dot graphics, and 144 (192) segments
48 (64) grayscale segments
Control up to a 4
×
8 (32 key) matrix key scan.
3 general ports built-in
Low-power operation support:
1
HD66724/HD66725
Vcc = 1.8 to 5.5 V (low voltage)
V
LCD
= 3.0 to 6.5 V (liquid crystal drive voltage)
Single, double or triple booster for liquid crystal drive voltage
Contrast adjuster and voltage followers to decrease direct current flow in the LCD drive bleeder-
resistors
Wake-up feature using key scan interrupt
Programmable drive duty ratios and bias values displayed on LCD
•
Clock-synchronized serial interface
•
4-/8-bit bus interface capability (except when key scan circuit is used)
•
80
×
8-bit display data RAM (80 characters max)
•
20,736-bit (6
×
8 dots : 432 characters) character generator ROM
•
384
×
8-bit (64 characters) character generator RAM
•
96
×
2-bit (192 segment-icons and marks max) segment RAM
•
72- (96-) segment
×
26-common-signal liquid crystal display driver
•
Programmable display sizes and duty ratios
•
Vertical and horizontal smooth scrolls
•
Vertical double-height display
•
Selectable CGROM memory bank (max. 432 fonts)
•
Wide range of instruction functions:
Clear display, display on/off control, icon and mark control, character blink, black-white reversed
blinking cursor, return home, cursor on/off, black-white reversed raster-row
•
No wait time for instruction execution and RAM access (zero instruction)
•
Internal oscillation (with external or built-in resistor) hardware reset
•
Shift change of segment and common driver
•
Slim chip with bumps for chip-on-glass (COG) mounting, and tape carrier package (TCP)
Table 1
Progammable Display Sizes and Duty Ratios
Character Display
Duty Optimum
Ratio Drive Bias
1/2
1/10
1/18
1/26
1/2
1/4
1/5
1/6
HD66724
Unavailable
1 line x 12
characters
2 lines x 12
characters
3 lines x 12
characters
HD66725
Unavailable
1 line x 16
characters
2 lines x 16
characters
3 lines x 16
characters
Graphics Display
HD66724
Unavailable
72 x 8 dots
HD66725
Unavailable
96 x 8 dots
HD66724:
144
Segment
Display
Scanned General
Keys
Ports
32 (4 x 8) 3
72 x 16 dots 96 x 16 dots HD66725:
192
72 x 24 dots 96 x 24 dots
2
HD66724/HD66725
Total Current Consumption Characteristics (Vcc = 3 V, fosc = 32 kHz, TYP
Conditions, LCD Drive Power Current Included)
Total Power Consumption
Normal Display Operation
Character
Display Size
Duty
Ratio
Optimum Frame
Drive Bias Frequency
1/2
1/4
1/5
1/6
80 Hz
80 Hz
74 Hz
77 Hz
Internal
Logic
(14
µA)
(20
µA)
(20
µA)
(20
µA)
LCD
Power
(12
µA)
(17
µA)
(17
µA)
(17
µA)
Total*
(26
µA)
(54
µA)
(54
µA)
(54
µA)
Sleep
Mode
(11
µA)
(11
µA)
(11
µA)
Standby
Mode
Segment only 1/2
1-line display
2-line display
3-line display
1/10
1/18
1/26
(11
µA)
0.1
µA
Note : When duty ratio = 1/2 and a double booster is not used:
the total power consumption = Internal logic current + LCD power current
When duty ratio = 1/10 and a double booster is used:
the total power consumption = Internal logic current + LCD power current x 2
Type Name
Types
HD66724RA03TA0L
HCD66724RA03BP
HD66725A03TA0L
HCD66725A03BP
External
Dimensions
TCP
Au-bumped chip
TCP
Au-bumped chip
Operation
Voltages
1.8 V to 5.5 V
Internal Fonts
Katakana, alphanumerics, symbols
and European fonts
3
HD66724/HD66725
LCD-II Family Comparison
Items
Character display sizes
Graphic display sizes
Multiplexing icons
Annunciator
Key scan control
LED control ports
General output port
Operating power voltages
Liquid crystal drive voltages
Serial bus
Parallel bus
Expansion driver control
Liquid crystal drive duty ratios
Liquid crystal drive biases
Liquid crystal drive waveforms
Liquid crystal voltage booster
Bleeder-resistor for liquid crystal drive
Liquid crystal drive operational amplifier
Liquid crystal contrast adjuster
Horizontal smooth scroll
Vertical smooth scroll
Double-height display
DDRAM
CGROM
CGRAM
SEGRAM
No. of CGROM fonts
No. of CGRAM fonts
Font sizes
Bit map area
R-C oscillation resistor/oscillation
frequency
Reset function
Low power control
HD66712U
12 characters x 4 lines
—
60
—
—
—
—
2.7 V to 5.5 V
3 V to 13 V
Clock-synchronized serial
4 bits, 8 bits
Possible
1/17, 33
1/4 to 1/6, 7
B
Double or triple
External
—
—
Dot unit
—
—
80 x 8
9,600
64 x 8
16 x 8
240
8
5x8
—
External resistor (270 kHz)
Incorporated, external
LP display mode
HD66720
8 characters x 2 lines
—
42
—
5x6
2
—
2.7 V to 5.5 V
3 V to 11 V
Clock-synchronized serial
—
Possible
1/9, 17
1/4 to 1/5
B
Double or triple
External
—
—
Dot unit
—
—
40 x 8
9,600
64 x 8
16 x 8
240
8
5x8
—
External resistor (150 kHz)
Incorporated, external
LP display mode
Simple standby
HD66705U
12 characters x 2 lines
—
40
Static: 10
—
—
—
2.4 V to 5.5 V
3 V to 9 V
Clock-synchronized serial
4 bits, 8 bits
Impossible
1/10, 18
1/4
B
Double or triple
Incorporated (external)
Incorporated
Incorporated
—
Line unit
Yes
60 x 8
9,600
32 x 5
8x5
240
4
5x8
—
External resistor
(40, 80 kHz)
External
Partial display off
Display off
Oscillation off
Liquid crystal power off
SEG only
—
—
TCP-153
Yes
Yes
153
9.69 x 2.73
120
µm
SEG/COM direction switching
QFP package
TQFP package
TCP package
Bare chip
Bumped chip
No. of pins
Chip sizes
Pad intervals
—
(S mask)
—
TCP-128
Yes
Yes
128
4.95 x 5.27
128
µm
—
QFP-1420
TQFP-1414
—
Yes
—
100
5.60 x 6.00
160
µm
4
HD66724/HD66725
LCD-II Family Comparison (cont)
Items
Character display sizes
Graphic display sizes
Multiplexing icons
Annunciator
Key scan control
LED control ports
General output ports
Operating power voltages
Liquid crystal drive voltages
Serial bus
Parallel bus
Expansion driver control
Liquid crystal drive duty ratios
Liquid crystal drive biases
Liquid crystal drive waveforms
Liquid crystal voltage booster
Bleeder-resistor for liquid crystal drive
Liquid crystal drive operational amplifier
Liquid crystal contrast adjuster
Horizontal smooth scroll
Vertical smooth scroll
Double-height display
DDRAM
CGROM
CGRAM
SEGRAM
No. of CGROM fonts
No. of CGRAM fonts
Font sizes
Bit map area
R-C oscillation resistor/
oscillation frequency
Reset function
Low power control
HD66717
12 characters x 4 lines
—
40
Static: 10
—
—
—
2.4 V to 5.5 V
3 V to 13 V
I2C, Clock-synchronized
serial
4 bits, 8 bits
Impossible
1/10, 18, 26, 34
1/4, 1/6
B
Double or triple
Incorporated (external)
Incorporated
Incorporated
—
Line unit
Yes
60 x 8
9,600
32 x 5
8x5
240
4
5x8
—
External resistor
(40-160 kHz)
External
Partial display off
Display off
Oscillation off
Liquid crystal power off
SEG only
—
—
TCP-153
Yes
Yes
153
10.88 x 2.89
120
µm
HD66727
12 characters x 4 lines
—
40
Static: 12
4x8
3
3
2.4 V to 5.5 V
3 V to 13 V
I2C, Clock-synchronized
serial
—
Impossible
1/10, 18, 26, 34
1/4, 1/6
B
Double or triple
Incorporated (external)
Incorporated
Incorporated
—
Line unit
Yes
60 x 8
11,520
32 x 6
8x6
240
4
5 x 8, 6 x 8
—
External resistor
(40-160 kHz)
External
Partial display off
Display off
Oscillation off
Liquid crystal power off
Key wake-up interrupt
SEG, COM
—
—
TCP-158
Yes
Yes
158
11.39 x 2.89
120
µm
HD66724
12 characters x 3 lines
72 x 26 dots
144
1/2 duty: 144
8x4
—
3
1.8 V to 5.5 V
3 V to 6 V
Clock-synchronized serial
4 bits, 8 bits
Impossible
1/2, 10, 18, 26
1/4 to 1/6.5
B
Single, double or triple
Incorporated (external)
Incorporated
Incorporated
3-dot unit
Line unit
Yes
80 x 8
20,736
384 x 8
72 x 8
240 + 192
64
6x8
72 x 26
External resistor,
incorporated (32 kHz)
External
Partial display off
Display off
Oscillation off
Liquid crystal power off
Key wake-up interrupt
SEG, COM
—
—
TCP-146
—
Yes
146
10.34 x 2.51
80
µm
SEG/COM direction switching
QFP package
TQFP package
TCP package
Bare chip
Bumped chip
No. of pins
Chip sizes
Pad intervals
5
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