LG Electronics KS360 service manual Power ON/OFF, Remote Power On

3. TECHNICAL BRIEF

3.4 Power ON/OFF

KS360 series Power State : Defined 3cases as follow

]Power-ON : Power key detect (S-GOLDradio PWRON port)

]Power-ON-charging : Charger or USB detect.

Remote Power On

RPWRON_EN

R223

RPWRON

2K

R225 100K

330K R219

R221

3.3M

1 2 3

C226

10u

6 5 4

2V0_VRTC			END
2K	R220
	PWRON	R222
		END_KEY
		10K
		100K	R224
	EMX18
	Q201

END_KEY_IN

KEY_COL7

KEY_ROW6

END_KEY_IN

Figure 6. Remote power on and End-key power on circuit.

Input ON is a power-on input for S-GOLDradio with 2 active high levels (see Figure 6). It might be triggered by a push button. 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 BJT as following figure. As monitoring the RPWRON and Key matrix KEY_COL7 & KEY_ROW6, KS360 series system recognize whether remote power on or End-key pushed

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