Outline Of Alarm Comparator - Fujitsu MB96300 series Hardware Manual

F2mc-16fx 16-bit

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CHAPTER 19 ALARM COMPARATOR

Outline of Alarm Comparator

This chapter provides an overview of the Alarm Comparator (also called Under/Overﬂow

voltage Detection), describes the register structure, modes and the operation of the

Alarm Comparator

■ Outline of Alarm Comparator

• The Alarm Comparator consists of an analog and a digital part.

• The analog part compares the input voltage with AVCC, AVSS or an internal reference voltage VREF

and generates digital output signals OUT1 and OUT2 for the digital part.

• If the voltage level at the input pin is higher than the lower threshold, OUT2 switches to high state.

• If the voltage level at the input pin is higher than the upper threshold, OUT1 switches to high state.

• The digital part uses OUT1 and OUT2 and generates an interrupt to CPU if the voltage is higher than the

upper threshold or lower than the lower threshold.

• The Alarm Comparator can be configured and controlled by the ACSRn and AECSRn registers.

• The Alarm Comparator can be switched between fast and slow comparison mode to reduce power

• The Alarm Comparator can be switched to power down mode.

MB96300 Super Series Hardware Manual