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VFD Driver/Controller IC
PT6315
PT6315 v2.0
Page 9
Sep. 2002
PT6315 Key Matrix & Key Input Data Storage RAM
PT6315 Key Matrix consists of 16 x 2 array as shown below:
Figure 6: PT6315 Key Matrix
Each data inputted by each key are stored as follows. They are read by a READ Command, starting
from the last significant bit. When the most significant bit of the data (SG1, b0) has been read, the least
significant bit of the next data (SG16, b7) is read.
Figure 7: PT6315 Key Input Data Storage
K1
K2
SG
1/
KS
1
SG
2/
KS
2
SG
3/
KS
3
SG
4/
KS
4
SG
5/
KS
5
SG
6/
KS
6
SG
7/
KS
7
SG
8/
KS
8
SG
9/
KS
9
SG
10
/K
S1
0
SG
11
/K
S1
1
SG
12
/K
S1
2
SG
1
3/
KS
13
K1 ........... K2 K1 ............... K2 K1 ........... K2 K1 ............... K2
SG1/KS1
SG5/KS5
SG9/KS9
SG11/KS11
SG3/KS3
SG7/KS7
SG11/KS11
SG15/KS15
SG2/KS2
SG6/KS6
SG10/KS10
SG14/KS14
SG4/KS4
SG8/KS8
SG12/KS12
SG16/KS16
READING
SEQUENCE
b0 ............b1
