lc75863e Sanyo Semiconductor Corporation, lc75863e Datasheet - Page 21

• Manufacturer Part Number: lc75863e
• Description: 1/3 Duty Lcd Display Drivers With Key Input Function
• Manufacturer: Sanyo Semiconductor Corporation

Sample Application Circuit 4
1/3 bias (for use with large panels)
Note: *8. Add a capacitor to the logic block power supply line so that the logic block power supply voltage V
Notes on transferring display data from the controller
The display data (D1 to 75) is transferred to the LC75863E/W in two operations. All of the display data should be
transferred within 30 ms to maintain the quality of the displayed image.
From the
controller
To the controller
To the controller
power supply
*9. The DO pin, being an open-drain output, requires a pull-up resistor. Select a resistance (between 1 to 10 kΩ) appropriate for the capacitance of
10 k
C
logic block power supply voltage V
the external wiring so that signal waveforms are not degraded.
0.047 F
+5.5 V
+5 V
R
1 k
*9
C
C
*8
DD
R
R
R
fall time when power drops are both at least 1 ms, as the LC75863E/W is reset by the VDET.
VDD
VSS
TEST
VLCD
VLCD1
VLCD2
CE
CL
DI
DO
LC75863E, 75863W
K
5
I
K
4
I
K
3
I
OSC
K
2
I
K
1
I
K
S
6
K
S
5
K
S
4
K
S
3
S
K
S
2
5
2
/
S
K
S
2
4
1
/
COM1
COM2
COM3
P1/S1
P2/S2
P3/S3
P4/S4
Key matrix
(up to 30 keys)
S23
S5
DD
rise time when power is applied and the
(S24)
(S25)
(P1)
(P2)
(P3)
(P4)
(general-purpose
output ports)
Used with the
backlight controller
or other circuit.
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