bu9768ak ROHM Co. Ltd., bu9768ak Datasheet - Page 6

• Manufacturer Part Number: bu9768ak
• Description: Driver Segmented Module With Input Function
• Manufacturer: ROHM Co. Ltd.

6
Standard ICs
(1 / 3 bias mode)
(1 / 2 bias mode)
The pull-up resistor value should be set to a value so that the waveform is not destroyed by the wiring capacitance
or other factors.
-COM
-COM
R
R
C
R
C
R
R
R
C
C
R
1
2
2
3
3
4
1
2
2
3
3
, C
, C
1
1
: Constants should be set to match
: 47k
: 1000pF (fosc = 38kHz)
: The constant should be set to match the
:
: 1k ~ 10k
: Constants should be set to match
: 47k
: 1000pF (fosc = 38kHz)
:
: 1k ~ 10k
data communications.
panel, through testing or other means
R
data communications.
R
4
0.047 F
3
0.047 F
(fosc = 38kHz)
C
(fosc = 38kHz)
3
C
C
3
3
GND
R
R
GND
3
3
C
C
1
1
Fig. 4
Fig. 3
R
C
R
.
C
1
2
1
2
V
RST
V
V
CS
CK
DI
DO
V
RST
V
V
CS
CK
DI
DO
DD
DD
DD
DD
DD
DD
KI
KI
R
1
2
R
1
2
1
OSC S
1
2
OSC S
2
Key matrix (30 maximum)
Key matrix (30 maximum)
KI
KI
2
2
1
1
(EP
(EP
KI
1
KI
1
) · · · · · · · · · · · · S
LCD panel
) · · · · · · · · · · · · S
LCD panel
3
3
KI
KI
4
4
BU9768AK / BU9768AKV
COM
COM
COM
COM
COM
COM
KI
KI
KO
KO
KO
KO
KO
KO
KO
KO
KO
KO
KO
KO
5
5
40
40
1
2
3
1
2
3
4
5
6
1
2
3
1
2
3
4
5
6