LG -P940 Service Manual page 100

Confidential
VBAT
LPBG
LPMU
LRTC
ON event
High Precition Bandgap
Step-Down 1
Step-Down 2
LPLL
LIO_12
LUSB_PD
LUSB_ANA
LUSB_IO
REF_CLK_EN
BaseBand reset
Figure 4 PMU Start-up / Shut-down Timing
2.1 PAD Timing
RESET_PWRDWN
Power on Reset
RESET_BB_N_i
REF_CLK_EN_o
LGE Internal Use Only
BaseBand reset_n
LPMU@1.1V
ON event
detected
XX
XX
20µs
Battery insertion
XMM6260 PMU Power on sequence
LPMU
LRTC
VSD2
self enabling
pad
TM_EN
pad active
pad active
POR enables
RESET pad
ON1_i
ON2_N_i
TRIG_B_i
LPMU@1.3V
2180µs 2560µs
Start-up
pad active
pad active
pad active
pad active
pad active
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pad active
4. TROUBLE SHOOTING
1500µs 1520µs 200µs 200µs 20µs 16ms
200µs 200µs
Only for training and service purposes
X
PMU
20µs
20µs
Reset