HT32F22366 datasheet(9/56 Pages) HOLTEK

9 / 56 page

Rev. 1.00

9 of 56

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External Interrupt/Event Controller – EXTI

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Up to 16 EXTI lines with configurable trigger source and type

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All GPIO pins can be selected as EXTI trigger source

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Source trigger type includes high level, low level, negative edge, positive edge, or both edge

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Individual interrupt enable, wakeup enable and status bits for each EXTI line

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Software interrupt trigger mode for each EXTI line

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Integrated deglitch filter for short pulse blocking

The External Interrupt/Event Controller, EXTI, comprises 16 edge detectors which can generate

a wake-up event or interrupt requests independently. Each EXTI line can also be masked

independently.

Analog to Digital Converter – ADC

▆

12-bit SAR ADC engine

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Up to 1 Msps conversion rate

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Up to 16 external analog input channels

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Conversion range: VREF+ ~ VREF-

A 12-bit multi-channel ADC is integrated in the device. There are multiplexed channels, which

include 16 external analog signal channels and 2 internal channels can be measured. If the input

voltage is required to remain within a specific threshold window, an Analog Watchdog function

will monitor and detect these signals. An interrupt will then be generated to inform the device

that the input voltage is not within the preset threshold levels. There are three conversion modes

to convert an analog signal to digital data. The ADC can be operated in one shot, continuous and

discontinuous conversion modes.

Analog Comparator – CMP

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Two rail-to-rail comparators

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Each comparator has configurable negative inputs used for flexible voltage selection

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Dedicated I/O pin or internal voltage reference provided by 6-bit scaler

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Programmable hysteresis

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Programming speed and consumption

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Comparator output can be output to I/O or to timers or ADC trigger inputs

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6-bit scaler can be configurable to dedicated I/O for voltage reference

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Comparator has interrupt generation capability with wakeup MCU from Sleep or Deep Sleep

modes through the EXTI controller

The two general purpose comparators (CMP) are implemented within the device. They can be

configured either as standalone comparators or combined with the different kinds of peripheral IP.

Each comparator is capable of asserting interrupts to the NVIC or wakeup the MCU Sleep or Deep

Sleep modes through EXTI wakeup event management unit.

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