Power On/Off - LG GT350 Service Manual

3.4 Power ON/OFF

GT350 Power State : Defined 3cases as follow
Power-ON : Power key detect (SM-Power's ON port)
Power-ON-charging : Charger detect.
Input ON is a power-on input for SM-POWER with 2 active high levels (see Figure 6). It might be triggered by
a push button or by the RTCOUT output of the S-GOLD device as well. To detect if the push-button is pressed
during system operation the logical level at pin ON or its change (if Bit 1 EION in INTCTRL2 is asserted) is
recorded in bit LON of the ISF register. If the high level of voltage at pin ON does not reach VIHdet (Vbat-0.8 ~
Vbat-0.3) the above-mentioned bit won't be set.
To support Remote power on function for factory mass production, applied an analog switch as following
figure. As monitoring the F_MODE and Key matrix KEY_ROW5& KEY_COL7, GT350 system recognize whether
remote power on or End-key pushed.
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 6 Power on application.
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3. TECHNICAL BRIEF
LGE Internal Use Only