hd66712u Renesas Electronics Corporation., hd66712u Datasheet - Page 81

• Manufacturer Part Number: hd66712u
• Description: Dot-matrix Liquid Crystal Display Controller/driver - Hitachi Semiconductor
• Manufacturer: Renesas Electronics Corporation.

HD66712U
10. Input/output current is excluded. When input is at an intermediate level with CMOS, the excessive
11. Applies only to external clock operation.
12. Applies only to the internal oscillator operation using oscillation resistor R
444
current flows through the input circuit to the power supply. To avoid this from happening, the input
level must be fixed high or low.
Referential data
R
f
400
300
200
270
Oscillator
OSC1
OSC2
Open
50
i) HD66712S
ii) HD66712U
V
91
CC
R
R :
R :
R
R
Since the oscillation frequency varies depending on the OSC1 and
OSC2 pin capacitance, the wiring length to these pins should be minimized.
100
f
OSC1
OSC2
f
f
f
f
(k )
: 110 k
: 130 k
= 5V
75 k
91 k
130
150
2% (when V
2% (when V
2% (when V
2% (when V
HD66712U (typ.)
HD66712S (typ.)
0.7 V
0.5 V
0.3 V
Duty =
CC
CC
CC
CC
CC
CC
CC
= 3V to 4V)
= 4V to 5V)
= 3V to 4V)
= 4V to 5V)
T
h
T
+ T
h
400
300
200
270
l
t
fcp
100%
50
T
h
75
V
t
fcp
CC
R
100
f
(k )
= 3V
110
T
l
f
.
150
HD66712S (typ.)
HD66712U (typ.)