Keyboard Interface Electrical Characteristics - Nokia RM-42 Service Manual

Nokia Customer Care
Pin
8 Row2
9 Row1
10 Row6
11 Row0
12 Col0
13 Row5
14 Row4
15 GND
16 Col3

Keyboard interface electrical characteristics

Description Parameter
High-level V
IH
input voltage
Low-level V
IL
input voltage
High-level V
OH
output
voltage
Low-level V
OL
output
voltage
Page 9–38
Signal I/O
->
->
->
->
->
->
->
->
Min
0.65* V
DDS
-0.3
1.62
Company Confidential
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Engine connection
Helen3
Helen3
Helen3
Helen3
Helen3
Helen3
Helen3
GND
Helen3
Typ Max
V 0.3+ V
DDS
0 0.35* V
V 1.98
DDS
0 0.45
(VDDS = 1.8V)
Kbr_2
Kbr_1
Kbr_6
Kbr_0
Kbc_0
Kbr_5
Kbr_4
Kbc_3
Unit
V
DDS
V
DDS
V
V
9241872 (Issue 1)
RM-42
System Module
Notes
Voice switch
connection
Notes
Row
Row
Column
Column