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VFD Driver/Controller IC
PT6312 Key Matrix & Key Input Data Storage RAM
PT6312 Key Matrix consists of 6 x 4 array as shown below:
PT6312
K1
K2
K3
K4
SG1/KS1
SG2/KS2
SG3/KS3
SG4/KS4
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 (SG6 b7) has been read, the least
significant bit of the next data (SG1 b0) is read.
K1…………………K4
SG1/KS1
SG3/KS3
SG5/KS5
b0………………….b3
K1…………………K4
SG2/KS2
SG4/KS4
SG6/KS6
b4………………….b7
SG5/KS5
Reading
Sequence
PT6312 V2.6
-8-
SG6/KS6
December, 2005
PTC [ PRINCETON TECHNOLOGY CORP ]
