Only For Training And Service Purposes - LG GB220 Service Manual

3. TECHNICAL BRIEF
3.2.9 Undervoltage Shutdown
In active mode the PMU periodically measures the battery voltage using the ADC from the charger unit. If the
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)
3.2.10 Software Reset
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
LGE Internal Use Only
LGE Internal Use Only
Figure 3.4.2 How sysclock Enable is Routed in the PMU
Copyright © 2007 LG Electronics. Inc. All right reserved.

Only for training and service purposes

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Only for training and service purposes