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STFPC320 Datasheet(PDF) 42 Page - STMicroelectronics

Part # STFPC320
Description  Front panel controller/driver with standby power management and real-time clock
PDF  78 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STFPC320 Datasheet(HTML) 42 Page - STMicroelectronics

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Key matrix
STFPC320
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8
Key matrix
The key matrix is of 12 x 2 configuration, as shown below.
The data of each key is stored as illustrated below and is read by a read command, starting
from the most significant bit.
Figure 18.
Key matrix and key-input data storage RAM
KEY1..KEY2
KEY1..KEY2
KEY1..KEY2
KEY1..KEY2
Reading last
Reading first
Seg1/KS1
Seg2/KS2
Seg3/KS3
Seg4/KS4
Seg5/KS5
Seg6/KS6
Seg7/KS7
Seg8/KS8
Seg9/KS9
Seg10/KS10
Seg11/KS11
Seg12/KS12
b0---------b1
b2---------b3
b4---------b5
b6---------b7
KEY
1
KEY
2
KEY
1
KEY
2
KEY
1
KEY
2



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