Name of Connection
Connector reference
Earpiece
B2101
IHF speaker
B2102
UI connections
Table 26 User interface connections
Pin
Signal
I/O
Engine connection
Notes
1
GND
GND
2
LED+
<-
N2301
VLEDOUT2
Discrete
Backlight SMPS
(controlled by
EM ASIC N2300)
3
Col2
->
D4800
Kbc_2
4
LED-
->
R2305 + V2300
SETCURR2
Serial re
Transistor
switch
(controlled by
EM ASIC N2300)
5
Col1
->
D4800
Kbc_1
Voice switch
connection
6
GND
GND
7
Row3
->
D4800
Kbr_3
8
Row2
->
D4800
Kbr_2
9
Row1
->
D4800
Kbr_1
10
Row6
->
D4800
Kbr_6
11
Row0
->
D4800
Kbr_0
12
Col0
->
D4800
Kbc_0
13
Row5
->
D4800
Kbr_5
Voice switch
connection
14
Row4
->
D4800
Kbr_4
15
GND
GND
16
Col3
->
D4800
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
Low-level
input voltage
V
IL
-0.3
0
0.35* V
DDS
V
Row
RM-180
System Module
Nokia Customer Care
Issue 1
COMPANY CONFIDENTIAL
Page 9 –39
Copyright © 2006 Nokia. All rights reserved.