Copyright © 2009 LG Electronics. Inc. All right reserved.
3. Technical brief
GD510 Operational Description Revision A
LG Electronics 31/113 LGE Property
3.4. Power ON/OFF
GD510 Power State: Defined 3cases as follow
ඖ Power-ON: Power key detect (SM-Power’s ON port)
ඖ Power-ON-charging: Charger detect.
Figure 6 Power on application.
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 RPWRON and Key matrix KP_OUT(2) &
KP_IN (6), GD510 system recognize whether remote power on or End-key pushed
Figure 7 Remote power on and End-key power on circuit
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