GX500 Operational Description Revision A
LG Electronics 47/143 LGE Property
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 (0), GX500 system recognize
whether remote power on or End-key pushed
Figure 3-10 Remote power on and End-key power on circuit
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