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3. Technical Brief
3.8. Keypad Switching & Scanning
The keypad interface is a peripheral which can be used for scanning keypads up to 8 rows (outputs from
Port Control Logic) and 8 columns (inputs to PCL). The number of rows and columns depend on settings
of the PCL.
END KEY
END
ON-END
END_KEY
KEYPAD
KEY_ROW0
KEY_ROW1
KEY_ROW2
KEY_ROW3
KEY_ROW4
KEY_COL0
KEY_COL1
KEY_COL2
KEY_COL3
KEY_COL4
LGE Internal Use Only
END_KEY
VBAT
CLR
KB12
KB6
1
SW103
SW106
4
SW101
SW109
7
SW104
SW102
*
KB5
SW105
Figure 11. Key pad part key matrix
- 40 -
3
R227
Q201
2
KTC4075E
10K
1
R228
100k
FAV
CAMERA
KB1
2
3
LEFT
KB7
SW107
5
6
KB9
UP
SW108
8
9
KB13
RIGHT
SW100
0
#
DOWN
KB10
KB11
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
END_KEY_IN
KEY_ROW0
KEY_COL2
MENU
KB4
KB2
SEL
KB3
SEND
KB8
CONF
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Table of Contents
Troubleshooting
