HD66710 Datasheet, PDF (3/73 Pages) Hitachi Semiconductor – (Dot Matrix Liquid Crystal Display Controller/Driver)

HD66710
LCD-II Family Comparison
Item
LCD-II
(HD44780U)
HD66702R
HD66710
HD66712U
Power supply voltage 2.7V to 5.5V
5V ±10%
(standard)
2.7V to 5.5V
(low voltage)
2.7V to 5.5V
2.7V to 5.5V
Liquid crystal drive
voltage
3.0V to 11V
3.0V to 8.3V
3.0V to 13.0V
2.7V to 11.0V
Maximum display
digits per chip
8 characters
× 2 lines
20 characters
× 2 lines
16 characters ×
2 lines/
8 characters ×
4 lines
24 characters ×
2 lines/
12 characters ×
4 lines
Segment display
None
None
40 segments
60 segments
Display duty cycle 1/8, 1/11, and 1/16 1/8, 1/11, and 1/16 1/17 and 1/33
1/17 and 1/33
CGROM
9,920 bits
(208 5 × 8 dot
characters and
32 5 × 10 dot
characters)
7,200 bits
(160 5 × 7 dot
characters and
32 5 × 10 dot
characters)
9,600 bits
(240 5 × 8 dot
characters)
9,600 bits
(240 5 × 8 dot
characters)
CGRAM
64 bytes
64 bytes
64 bytes
64 bytes
DDRAM
80 bytes
80 bytes
80 bytes
80 bytes
SEGRAM
None
None
8 bytes
16 bytes
Segment signals
40
100
40
60
Common signals
16
16
33
34
Liquid crystal drive A
B
B
B
waveform
Bleeder resistor for External
LCD power supply (adjustable)
External
(adjustable)
External
(adjustable)
External
(adjustable)
Clock source
Extenal resistor or External resistor or External resistor or External resistor or
external clock
external clock
external clock
external clock
R_f oscillation
frequency (frame
frequency)
270 kHz ±30%
(59 to 110 Hz for
1/8 and 1/16 duty
cycle; 43 to 80 Hz
for 1/11 duty cycle)
320 kHz ±30%
270 kHz ±30%
(70 to 130 Hz for (56 to 103 Hz for
1/8 and 1/16 duty 1/17 duty cycle; 57
cycle; 51 to 95 Hz to 106 Hz for 1/33
for 1/11 duty cycle) duty cycle)
270 kHz ±30%
(56 to 103 Hz for
1/17 duty cycle; 57
to 106 Hz for 1/33
duty cycle)
R_f resistance
91 kΩ: 5-V
operation;
75 kΩ: 3-V
operation
68 kΩ: 5-V
operation;
56 kΩ: (3-V
operation)
91 kΩ: 5-V
operation;
75 kΩ: 3-V
operation)
130 kΩ: 5-V
operation;
110 kΩ: 3-V
operation
Liquid crystal voltage None
booster circuit
None
2-3 times step-
up circuit
2-3 times step-
up circuit
293