Comparator (Comp); Comp Introduction; Comp Main Features - STMicroelectronics STM32F05 series Reference Manual

RM0091
14

Comparator (COMP)

14.1

COMP introduction

The STM32F05xxx embeds two general purpose comparators COMP1 and COMP2 that
can be used either as standalone devices (all terminal are available on I/Os) or combined
with the timers. They can be used for a variety of functions including:
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Wake-up from low-power mode triggered by an analog signal,
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Analog signal conditioning,
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Cycle-by-cycle current control loop when combined with the DAC and a PWM output
from a timer.
14.2

COMP main features

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Rail-to-rail comparators
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Each comparator have selectable threshold
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–
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Programmable hysteresis
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Programmable speed and consumption
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The outputs can be redirected to an I/O or to multiple timer inputs for triggering:
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–
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Every two comparators can be combined in a window comparator (COMP1/COMP2,).
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The two comparators can be combined in a window comparator
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Each comparator has interrupt generation capability with wake-up from Sleep and Stop
modes (through the EXTI controller)
3 I/O pins
DAC1
The internal reference voltage and three sub-multiple values (1/4, 1/2, 3/4)
Capture events
OCref_clr events (for cycle-by-cycle current control)
Break events for fast PWM shutdowns
Doc ID 018940 Rev 1
Comparator (COMP)
215/742