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PDF HD66727 Data sheet ( Hoja de datos )
| Número de pieza | HD66727 | |
| Descripción | Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver | |
| Fabricantes | Hitachi Semiconductor | |
| Logotipo |  |
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HD66727
(Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver
with Key Scan Function)
Description
The HD66727, dot-matrix liquid crystal display controller and driver LSI incorporating a key scan
function, displays alphanumerics, katakana, hiragana, and symbols. It can be configured to drive a dot-
matrix liquid crystal display and control key scan functions under the control of an I2C bus or a clock-
synchronized serial microprocessor. A single HD66727 is capable of displaying up to four 12-character
lines, 40 segments, and 12 annunciators, and controlling up to a 4-by-8 key matrix, and driving three LED.
The HD66727 incorporates all the functions required for driving a dot-matrix liquid crystal display such as
display RAM, character generator, and liquid crystal drivers, and it also incorporates a booster for the LCD
power supply and key scan functions.
The HD66727 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 HD66727, with the above functions, is suitable for any portable battery-
driven product requiring long-term driving capabilities and small size.
Features
• Control and drive of a dot-matrix LCD with built-in key scan functions
• Four 12-character lines, 40 segments, and 12 annunciators
• Control of up to a 4 × 8-key matrix, 3 LED ports and 3 general ports
• Low-power operation support:
2.4 to 5.5V (low voltage)
Double or triple booster for liquid crystal drive voltage
Contrast adjuster and voltage followers for decreasing the direct current flow in the LCD drive
bleeder-resistors
Standby mode and sleep mode
Displays up to 12 static annunciators
• I2C bus or clock-synchronized serial interface
• 60 × 8-bit display data RAM (60 characters max)
1
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HD66727
LCD-II Family Comparison (cont)
Item
HD66720
HD66717
Power supply voltage
2.7V to 5.5V
2.4V to 5.5V
Liquid crystal drive
voltage
3.0 to 11.0V
3.0 to 13.0V
Maximum display
characters per chip
10 characters ×
1 line/
8 characters ×
2 lines
12 characters ×
1 line/2 lines/3 lines/4 lines
Segment display
42 (extended to 80)
40 (and 10 annunciators)
Display duty ratio
1/9 and 1/17
1/10, 1/18, 1/26, and 1/34
CGROM
9,600 bits
(240 5-×-8 dot
characters)
9,600 bits
(240 5-×-8 dot
characters)
CGRAM
64 bytes
32 bytes
DDRAM
40 bytes
60 bytes
SEGRAM
16 bytes
8 bytes
Segment signals
42
60
Common signals
17
34
Liquid crystal drive
waveform
B
B
Clock source
External resistor
or external clock
External resistor
or external clock
Rf oscillation frequency 160 kHz ± 30%
1-line mode: 40 kHz ± 30%
2-line mode: 80 kHz ± 30%
3-line mode: 120 kHz ± 30%
4-line mode: 160 kHz ± 30%
Liquid crystal voltage
booster circuit
Double or triple
booster circuit
Double or triple
booster circuit
Liquid crystal drive
operational amplifier
None
Built-in for each V1 to V5
Bleeder-resistor for liquid External
crystal drive
Internal 1/4 and 1/6 bias
resistors
Liquid crystal contrast
adjuster
None
Incorporated
Key scan circuit
5 × 6 = 30 keys
None
Extension driver control Independent
signal
control signal
None
Reset function
Internal reset
circuit or reset input
Reset input
Horizontal smooth scroll Dot unit and
line unit
Impossible
Vertical smooth scroll
Impossible
Dot (raster-row) unit
Number of displayed lines 1 or 2
1, 2, 3, or 4
Low power control
Low power mode and sleep Standby mode and
mode
sleep mode
Bus interface
Serial
I2C, serial, 4, or 8 bits
Package
100-pin QFP1420
100-pin TQFP1414
100-pin bare chip
Slim chip with/without bumps
TCP
HD66727
2.4V to 5.5V
3.0 to 13.0V
12 characters ×
1 line/2 lines/3 lines/4 lines
40 (and 12 annunciators)
1/10, 1/18, 1/26, and 1/34
11,520 bits
(240 6-×-8 dot
characters)
32 bytes
60 bytes
8 bytes
60
34
B
External resistor
or external clock
1-line mode: 40 kHz ± 30%
2-line mode: 80 kHz ± 30%
3-line mode: 120 kHz ± 30%
4-line mode: 160 kHz ± 30%
Double or triple
booster circuit
Built-in for each V1 to V5
Internal 1/4 and 1/6 bias
resistors
Incorporated
4 × 8 = 32 keys
None
Reset input
Impossible
Dot (raster-row) unit
1, 2, 3, or 4
Standby mode and
sleep mode
I2C or clock-synchronized serial
Slim chip with/without bumps
TCP
5
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HD66727 Mounting Variations and Key-Matrix Configurations
(1) COB-1
LCD glass
COB board
Chip
RC
C
Heat seal
ON F1 F2
123
456
789
∗0#
Key-matrix board
(2) COB-2
LCD glass
(3) TCP
LCD glass
Heat seal
TCP
Chip
Chip
RC
C
ON F1 F2
123
456
789
∗0#
Key-matrix board
RC
C
ON F1 F2
123
456
789
∗ 0#
Key-matrix board
Figure 1 HD66727 Mounting Variations
HD66727
(4) COG
LCD glass
Chip
Heat seal
RC
C
ON F1 F2
123
456
789
∗0#
Key-matrix board
Table 2
Configurations of LCD Modules (LCM) with Key Scan Function for Different Mounting
Methods
Parts
LCD glass
LCM (COB)
substrate
HD66727
package
Heat seal
Key matrix
substrate
Chip-on-Board
(COB) Mounting 1
Necessary
Necessary
Bare chip
Necessary
Necessary
Chip-on-Board
(COB) Mounting 2
Necessary
Not necessary
Tape-Carrier-
Package (TCP)
Mounting
Necessary
Not necessary
Bare chip
TCP
Necessary
Necessary
Optional
Necessary
Chip-on-Glass
(COG) Mounting
Necessary
Not necessary
Bumped chip
Necessary
Necessary
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet HD66727.PDF ] | |
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