Only For Training And Service Purposes - LG -P520 Service Manual

3. TECHNICAL BRIEF
3.3.9 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)
3.3.10 Software Reset
A software reset does not affect any PMU register. The PMU register are reset with the reset_pmufsm_no
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
Figure 3.3.6 How sysclock Enable is Routed in the PMU
3. TECHNICAL BRIEF
- 2 -
Copyright © 2010 LG Electronics. Inc. All right reserved.

Only for training and service purposes