bu9768ak ROHM Co. Ltd., bu9768ak Datasheet - Page 11

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

In the Sleep modes, oscillation of the OSC pin stops, but if a button is pressed while the key scan output is on
the HIGH line, oscillation begins and a key scan is carried out. When the key scan has been completed, oscil-
lation stops again.
The output can be switched to match a variety of applications, depending on the combination of the four bits.
Note: When the power supply is turned on, the following settings are in effect for control codes. These initial
When the power supply is turned on:
(DP, S
• K
• P
• SC: Control switching the LCD display on and off
Standard ICs
K
Don't Care
0
0
0
0
0
0
0
0
1
1
1
1
Switching the LCD display on and off can be done regardless of the input data.
1: Display off
0: Display on (when displayed, displays can be obtained in accordance with the input data.)
0
Control code
S
0
0
0
0
1
1
, K
, P
Control code
0
settings for control codes should be changed to match the mode being used.
K
0
0
0
0
0
1
1
1
1
1
1
, S
: Control that switches between key scan and segment output
: Control that switches between segment and expansion pin output
1
1
, K
P
S
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
, K
P
0
1
0
1
0
1
0
1
0
1
0
1
1
1
, P
Normal
Mode
Sleep
Sleep
Sleep
0
44pin
, P
KO
KO
KO
KO
S
S
S
S
S
S
S
S
Key scan /
segment
41
41
41
41
41
41
41
41
1
1
1
1
1
, SC) = (0, 0, 0, 1, 1, 0, 0, 0)
Fixed at LOW
Fixed at LOW
Fixed at LOW
Segment /
common
45pin
Output
output
KO
KO
KO
KO
KO
KO
KO
KO
S
S
S
S
42
42
42
42
2
2
2
2
2
2
2
2
1pin
EP
EP
EP
EP
EP
EP
EP
EP
EP
S
S
S
Oscillating
Stopped
Stopped
Stopped
1
1
1
1
1
1
1
1
1
1
1
1
OSC
pin
expansion pin
2pin
EP
EP
EP
EP
EP
EP
EP
EP
EP
Segment /
S
S
S
2
2
2
2
2
2
2
2
2
2
2
2
KO
H
H
L
L
1
3pin
EP
EP
EP
EP
EP
EP
KO
S
S
S
S
S
S
H
H
L
L
3
3
3
3
3
3
3
3
3
3
3
3
Key scan output
2
KO
H
H
L
L
4pin
EP
EP
EP
S
S
S
S
S
S
S
S
S
3
4
4
4
4
4
4
4
4
4
4
4
4
KO
H
H
L
L
4
of display
segments
Max. no.
KO
H
H
H
L
120
114
111
108
123
117
114
111
126
120
117
114
5
KO
H
H
H
H
6
BU9768AK / BU9768AKV
Max.
input
key
30
30
30
30
25
25
25
25
20
20
20
20
11