ST STM32L4x6 User Manual

Comparator (COMP) RM0351
578/1693 DocID024597 Rev 3
19.3 COMP functional description
19.3.1 COMP block diagram
The block diagram of the comparators is shown in Figure 138: Comparators block diagram.
Figure 138. Comparators block diagram
19.3.2 COMP pins and internal signals
The I/Os used as comparators inputs must be configured in analog mode in the GPIOs
registers.
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
purposes:
• 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
externally.
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Table 109. COMP1 input plus assignment
COMP1_INP COMP1_INPSEL
PC5 0
PB2 1
Table 110. COMP1 input minus assignment
COMP1_INM COMP1_INMSEL[2:0]
¼ V
REFINT
000
½ V
REFINT
001

ST STM32L4x6 Specifications

General

Brand	ST
Model	STM32L4x6
Category	Microcontrollers
Language	English