User Guide

Pin Signal I/O Engine connection Notes
9 Row1 -> Helen3 Kbr_1
10 Row6 -> Helen3 Kbr_6
11 Row0 -> Helen3 Kbr_0
12 Col0 -> Helen3 Kbc_0
13 Row5 -> Helen3 Kbr_5
Voice switch
connection
14 Row4 -> Helen3 Kbr_4
15 GND GND
16 Col3 -> Helen3 Kbc_3
Keyboard interface electrical characteristics
Description Parameter Min Typ Max Unit Notes
High-level
input
voltage
V
IH
0.65* V
DDS
V
DDS
0.3+ V
DDS
V Row
(VDDS = 1.8V)
Low-level
input
voltage
V
IL
-0.3 0 0.35* V
DDS
V Row
High-level
output
voltage
V
OH
1.62 V
DDS
1.98 V Column
Low-level
output
voltage
V
OL
0 0.45 V Column
RM-1
System Module Nokia Customer Care
Issue 1 Company Confidential Page 9–35
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