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10.5.1 Activation via Power Switch interrupt request
When the POWER signal is asserted, the PMU asserts the POWERON signal to provide an external notification
that the CPU core is being activated. After asserting the POWERON signal, the PMU checks the BATTINH signal and
then de-asserts the POWERON signal.
If the BATTINH signal is at high level, the PMU cancels peripheral unit reset and starts the Cold Reset sequence
to activate the CPU core.
If the BATTINH signal is at low level, the PMU sets 1 to the BATTINH bit in the PMUINTREG register and then
performs another shutdown. After the CPU core is restarted, the BATTINH bit must be checked and cleared to 0 by
software.
Remark
Activation via Power Switch interrupt request never sets the POWERSWINTR bit in the PMUINTREG
register to 1.
Figure 10-3. Activation via Power Switch Interrupt Request (BATTINH = H)
RTC (Internal)
POWER (Input)
POWERON (Output)
MPOWER (Output)
BATTINH/BATTINT# (Input)
Figure 10-4. Activation via Power Switch Interrupt Request (BATTINH = L)
RTC (Internal)
POWER (Input)
POWERON (Output)
MPOWER (Output)
BATTINH/BATTINT# (Input)
CHAPTER 10 POWER MANAGEMENT UNIT (PMU)
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L
L
User's Manual U14272EJ3V0UM
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