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3. TECHNICAL BRIEF
3.6.3 Side Key
There are 4 main key buttons that are controlled by MSM7227. Refer to the Side Key circuit. 'Power Button'
Key is connected to PMIC(PM7540:KPD_PWR_N).
KEY_ROW[0]
KEY_ROW[1]
PM_ON_SW
Figure. Power ON / OFF & Suspend Button Key circuit
LGE Internal Use Only
KEY_COL[0]
FOCUS
SHUTTER
Table. Key Matrix Mapping Table
POWER ON
R306
470
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3. Technical Brief
KEY_COL[1]
VOL_DOWN
VOL_UP
KB300
D302
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Only for training and service purposes
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Troubleshooting
