Power On/Off - LG GD510 Service Manual

GD510 Operational Description

3.4. Power ON/OFF

GD510 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 RPWRON and Key matrix KP_OUT(2) &
KP_IN (6), GD510 system recognize whether remote power on or End-key pushed
VBAT
VIO_2V62
R402
D2
10K
R5 27 A4
USB_DM
R6 27 A5
USB_DP
B3
UART_RX
A3
UART_TX
A1
HB-1M1005-102JT
FB403
D4
HSO_L
1000 HB-1M1005-102JT
FB402
D3
HSO_R
1000
A2
I2C2_SCL
C421 C417
I2C2_SDA
27p 27p
USW_INT
LG Electronics
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 6 Power on application.
C448
1u
D5
BAT VB
C5
USW_DM
DN1 COMN1
U200 B5
USW_DP
DP2 COMP2
FB401
B4
MAX14526EEWP+TCC6
U1 UID USW_ID
U2
B1 R412 2.2K
RES
MIC
D1
AUD1 CAP
C1
AUD2
C4
GND 2.2uF
C3
ISET IC
VIO_2V62
R413 2.2K
Figure 7 Remote power on and End-key power on circuit
Power On
V_BUS
C413
6.8n
RPWRON_EN
R2
END
10Kohms
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3. Technical brief
Revision A
END_KEY_EN
KP_IN[6]
3
2
1
Q202
KTC4075E
KP_OUT[2]
100K
R1
LGE Property
LGE Internal Use Only