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3. TECHNICAL BRIEF
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3. TECHNICAL BRIEF
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 .
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)
Figure 3.4.2 How sysclock Enable is Routed in the PMU