LG GX500 Service Manual page 43

3. TECHNICAL BRIEF
GX500 Operational Description
Interfaces
• I2C control interface for device configuration
• PMU is configured in software via registers
• Power-on reset generation
• Interrupt (event) line to indicate status change.
Control Unit
• Device ON/OFF switching
• Over-temperature warning
• System start-up state machine
• Under-voltage shut down with defined system behavior
• Independent LDO switch on
• Software and hardware programmable voltages
• System watchdog timer with on-chip oscillator.
VRF3_2V85 VRF3_2V85
VRF3_2V85
C535
C514
10n
10n
100p 0.1u
C542 C512
VRF2_1V5
VSD2_1V8
VSD1_1V5
C505 C533
C511
100n 100n
100n
Figure 3-7 S-GOLDradio PMU circuit diagram
LGE Internal Use Only
LG Electronics
VRF3_2V85
VAUDIO_2V5
VRF3_2V85
VRF1_2V85
C538 C508 C534 C529 C503
C509
10n 0.1u 10n 0.1u
0.1u
2.2u
VUSB_3V1
S2_VBAT
VBT_2V9
C530 VPLL_1V5
1u
C527
C521
C528 C539
2.2u
1u 0.47u
2.2u
C532
1u
VMMC_1V8
C531
VIO_2V62 VRF1_2V85
VRF3_2V85 S2_VBAT
2.2u
C510
C504
1u C517
1u
2.2u
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Revision A
VRF2_1V5
C518
1u
VRTC_2V0
VSIM_2V9
S2_VBAT
C515 C513
220n 1u
Only for training and service purposes
LGE Property
SGR_RPWRON_EN