PT6315-S Datasheet, PDF (8/20 Pages) Princeton Technology Corp – VFD Driver/Controller IC

VFD Driver/Controller IC
PT6315-S Key Matrix & Key Input Data Storage RAM
PT6315-S Key Matrix consists of an 8 x 12 array as shown below:
K1
K2
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PT6315-S
Each data entered by each key is stored as follows. They are read by a READ Command, starting from
the last significant bit. When the most significant bit of the data (SG8, b7) has been read, the least
significant bit of the next data (SG0, b1) is read.
K1…………K1
SG1/KS1
*
SG5/KS5
b0………….b1
K1…………K2
SG2/KS2
*
SG6/KS6
b2………….b3
K1…………K2
SG3/KS3
*
SG7/KS7
b4………….b5
K1……………K2
SG4/KS4
*
SG8/KS8
b6…………….b7
Reading
Sequence
Note: * = These sections are not relevant but are needed to read the transmission clock.
PT6315-S V1.9
-8-
September, 2005