NJU6625 New Japan Radio Co.,Ltd, NJU6625 Datasheet - Page 11

• Manufacturer Part Number: NJU6625
• Description: Nju6625 12character 1-line Dot Matrix Lcd Controller Driver With Smooth Scroll Function
• Manufacturer: New Japan Radio Co.,Ltd

Ver.2008-03-21
Read out data
connected the switch goes to “1” and another bits go to “0”.
and bit (D
Key status is fetched at third quarter of “L” period (t
Scaned 8-bit data of key are read out through the srial I/F.
When a key on the key matrix is pressed, the bit corresponding to terminals (K
In case of Example 1, when the switch connecting to K
Example 1. One key is pressed
Keyscan data format
Key status fetching timing
D
1
15
S
S
1
0
1
D
) corresponding to S
0
14
D
1
15
D
1
13
K
3
D
0
D
K
14
Preliminary
0
12
2
K
3/4 t
D
1
1
output data
D
13
0
Keyscan
K
t
11
KP
KP
0
2
S
S
S
S
S
S
S
S
D
go to “1” but another bits go to “0”.
S
0
7
6
5
4
3
2
1
0
D
12
NJU6625
1
7
10
Fetching timing
S
D
6
0
11
D
S
1
9
5
D
3/4 t
S
1
10
4
D
1
KH2
t
8
KP
S
1
1
1
1
0
0
0
0
KP
3
D
1
KL3
S
D
9
2
7
KP
S
) of scan signals (S
D
1
1
KL2
D
KH1
8
2
K
S
6
1
1
0
0
1
1
0
0
3
and S
- K
0
D
0
KL1
0
D
7
5
2
is pressed, bit (D
D
K
1
KH0
KL0
D
ON
OFF
6
3
1
0
1
0
1
0
1
0
4
- K
0
D
0
D
5
0
0
3
to S
D
0
KH2
4
D
7
) as shown below:
V
V
2
LCD2
6
SS
) corresponding to K
D
S
0
KH1
D
7
3
3
- S
1
NJU6625
to K
0
D
0
KH0
D
2
0
0
, S
S
D
7
1
- S
7
1
to S
0
- 11 -
D
0
0
0
2
)