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LGE Internal Use Only
Copyright © 01 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
3. TECHNICAL BRIEF
Figure 3 4 2 How sysclock Enable is Routed in the PMU
3.2.9 Undervoltage Shutdown
In active mode the PMU periodically measures the battery voltage using the ADC from the charger unit. If the
b
i
d
b b l
h
bl h d
l
l ( ll d SYSOFF) h
h
Figure 3.4.2 How sysclock Enable is Routed in the PMU
3.2.10 Software Reset
A f
d
ff
PMU
i
Th PMU
i
i h h
f
battery is measured to be below the programmable shut-down level (called SYSOFF), the system changes to
OFF mode. This is done via the SHUTDOWN state of the PMU state machine. (see chapter switch OFF)
A software reset does not affect any PMU register. The PMU register are reset with the reset_pmufsm_n_o
signal. That means all PMU register are reset in OFF state. For details about the SW reset see chapter External
Reset Handling
ͽͶ͑ͺΟΥΖΣΟΒΝ͑ΆΤΖ͑ΟΝΪ
ZXVX[^
rf_sysclk_en_pmu
vcxo_enable
VPMU
VDDCORE
L
S
L
S
Isolation to 1
& LS
rf_sy
sclk_en
to the RF macro via the
core domain in reset
vcx
o_enable
rf_sy
sclk_en_pmu
rf_sy
sclk_en