Keypad Switching & Scanning - LG GM360i Service Manual

3.8 Keypad Switching & Scanning
The keypad interface is a peripheral which can be used for scanning keypads up to 3 rows (outputs from Port
Control Logic) and 3columns (inputs to PCL). The number of rows and columns depend on settings of the PCL.
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R400
KP_OUT[2]
680
VA402
R405
KP_OUT[3]
680
VA413
R402
KP_IN[3]
680
VA403
CAM&AF
4
3
2
1
CN404
VA414 VA416
Figure 10 Key pad part key matrix
42/147
KEY PAD
VOL UP & DOWN
CN403
1
2
3
4
R450
KP_OUT[1]
680
VA420
R404
KP_OUT[2]
680
VA412
R401
KP_OUT[3]
680
VA400
R403
KP_IN[5]
680
VA401
R417 680
KP_IN[3]
R416 680
KP_IN[6]
R415 680
KP_OUT[1]
VA415
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3. TECHNICAL BRIEF
CLR
KB402
SEND
KB400
Multi
KB401
LGE Property
LGE Internal Use Only