PT6324_10 Datasheet, PDF (8/16 Pages) Princeton Technology Corp – VFD Driver/Controller IC

PT6324
COMMAND 2: DATA SETTING COMMANDS
The Data Setting Commands executes the Data Write or Data Read Modes for PT6324. The data Setting Command, the
bits 5 and 6 (b4, b5) are given the value of “0”, bit 7 (b6) is given the value of “1” while bit 8 (b7) is given the value of “0”.
Please refer to the diagram below.
When power is turned ON, bit 4 to bit 1 (b3 to b0) are given the value of “0”.
MSB
LSB
0 1 0 0 b3 b2 b1 b0
Data write & read mode settings:
00: Write data to display mode
01: Reset function (one time reset)
10: Read key data
11: Not relevant
Address increment mode settings (Display mode):
0: Increment address after data has been written
1: Fixed address
Mode settings:
0: Normal operation mode
1: Test mode
PT6324 KEY MATRIX & KEY INPUT DATA STORAGE RAM
PT6324 Key Matrix consists of 16 x 2 array as shown below:
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 (SG16, b7) has been read, the least significant bit of the next data
(SG1, b0) is read.
K1……………….K2
SG1/KS1
SG5/KS5
SG9/KS9
SG13/KS13
b0………………..b
1
K1………………..K2
SG2/KS2
SG6/KS6
SG10/KS10
SG14/KS14
b2…………………b
3
K1……………….K2
SG3/KS3
SG7/KS7
SG11/KS11
SG15/KS15
b4………………..b
5
K1……………….K2
SG4/KS4
SG8/KS8
SG12/KS12
SG16/KS16
b6………………..b
7
Reading
Sequence
V1.5
8
June 2010