LG KG320 - Keypad Switches and Scanning

3.9 Keypad Switches and Scanning
DOWN
RIGHT
*
7
R120
0
0
R119
4
END
8
5
0
1
SEND
SELUP
VBAT
9
6
2
SHARP
3
OK
R101
10K
680R102
R122
0
0
R121
R126
0
0
R125
MENU
LEFT
R124
0
0
R123
R118
0
KEY_ROW1
KEY_ROW2
KEY_ROW3
KEY_ROW4
PWRKEY
KEY_COL4
KEY_COL0
KEY_COL3
KEY_COL2
KEY_COL1
3. TECHNICAL BRIEF
- 46 -
KEY PCB CONN
7
8
9
10 11
12
13
14
15
16
17
18
192
20
3
4
5
6
CN100
1
1u
VBAT
C101
RPWRON
2V5_VMIC
DE_RX
DE_TX
KEY_COL4
KEY_LIGHT
MIC_N MIC_P
PWRKEY KEY_ROW1
KEY_ROW2 KEY_ROW3
KEY_ROW4 KEY_COL0
KEY_COL1
KEY_COL3
KEY_COL2
Figure 3-22. KEYPAD SWITCHES AND SCANNING