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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3. Technical Brief
3.4. Power ON/OFF
GD310 Power State : Defined 3cases as follow
▶
Power-ON : Power key detect (SM-Power’s ON port)
▶
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 (0), GD310 system
recognize whether remote power on or End-key pushed
Figure 7. Remote power on and End-key power on circuit
R202
2K
130K
R205
130K
R225
2V11_RTC
R227
10K
KTC4075E
Q200
1
2
3
KTC4075E
Q201
1
2
3
100k
R228
KEY_COL2
KEY_ROW0
RPWRON_EN
END_KEY
PWRON
END_KEY_IN
END_KEY_IN
RPWRON
Содержание AR140B
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