User Guide

RH-30/RH-31 Company Confidential
System Module Nokia Customer Care
Page 52 © 2004 Nokia Corporation. Issue 2 11/2004
Rows are read while columns one at the time are written low. If some row is down it
indicates that the key which is at the cross point of selected column and row was
pressed. After key press detection registers in UPP are reset and columns are written back
to low state.
Figure 24: Keyboard matrix connections.
VD VU 3 6 9 #
2 5 8 0
1 4 7 *
SL Up Do SR
Le
Row4
Row3
Row2
Row1
Row0
Col0
Col1
Col2
Col3
Col4
UPP
UE
Se En Ri
PWRON
X
Le = Navi Left
Se = Send
En = End
Ri = Navi Right
SL = Soft Left
Up = Navi Up
Do = Navi Down
SR = Soft Right
VD = Volume Down
VU = Volume Up
Power
Switch
UEM
PWRONX