UPD16432B NEC, UPD16432B Datasheet - Page 9

• Manufacturer Part Number: UPD16432B
• Description: 1/8/ 1/15 DUTY LCD CONTROLLER/DRIVER
• Manufacturer: NEC

KEY MATRIX AND KEY DATA RAM CONFIGURATION
The key matrix has an 8
Key data is stored as shown below, and is read in MSB-first order by a read command.
KEY
KEY
KEY
KEY
1
2
3
4
KS
1
b7
KS
KEY
Pull-Up
Control Signal
KS
KS
KS
KS
In the event of key source output, the pull-up control signal
becomes “H”, and the pull-up transistor is turned on.
2
4 configuration, as shown below.
4
8
6
4
2
KS
To Key
Data RAM
KEY
b4 b3
3
3
KS
KEY
4
KS
KS
KS
KS
2
KS
7
5
3
1
KEY
Key Input Equivalent Circuit
5
b0
1
KS
6
KS
Read Order
7
KS
8
R
V
DD
Key data is as follows:
1: On
0: Off
=
KEY
n
PD16432B
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