Table 188. Compx Non-Inverting Input Assignment; Table 189. Compx Inverting Input Assignment - ST STM32G4 Series Reference Manual

Advanced arm-based 32-bit mcus

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COMP pins and internal signals

The I/Os used as comparators inputs must be configured in analog mode in the GPIOs

The comparator output can be connected to the I/Os using the alternate function channel

given in "Alternate function mapping" table in the datasheet.

The output can also be internally redirected to a variety of timer input for the following

Emergency shut-down of PWM signals, using BKIN and BKIN2 inputs

Cycle-by-cycle current control, using OCREF_CLR inputs

Input capture for timing measures

It is possible to have the comparator output simultaneously redirected internally and

COMP reset and clocks

The COMP clock provided by the clock controller is synchronous with the APB2 clock.

There is no COMP-dedicated clock enable control bit in the RCC controller. Reset and clock

enable bits are common for COMP and SYSCFG.

Important: The polarity selection logic and the output redirection to the port works

independently of APB clock. This allows the comparator to work even in Stop mode.

Table 188. COMPx non-inverting input assignment

RM0440 Rev 1

Comparator (COMP)

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