ST STM32L4+ Series Reference Manual page 814

Comparator (COMP)
Bit 22 BRGEN: Scaler bridge enable
Bit 21 Reserved, must be kept at reset value
Bits 20:18 BLANKING[2:0]: Comparator 2 blanking source selection bits
Bits 17:16 HYST[1:0]: Comparator 2 hysteresis selection bits
Bit 15 POLARITY: Comparator 2 polarity selection bit
Bits 14:10 Reserved, must be kept at reset value.
Bit 9 WINMODE: Windows mode selection bit
Bit 8 Reserved, must be kept at reset value.
Bit 7 INPSEL: Comparator 1 input plus selection bit
814/2301
This bit is set and cleared by software (only if LOCK not set). This bit enable the bridge of
the scaler.
0: Scaler resistor bridge disable (if BRGEN bit of COMP1_CSR register is also reset)
1: Scaler resistor bridge enable
If SCALEN is set and BRGEN is reset, BG voltage reference is available but not 1/4 BGAP,
1/2 BGAP, 3/4 BGAP. BGAP value is sent instead of 1/4 BGAP, 1/2 BGAP, 3/4 BGAP.
If SCALEN and BRGEN are set, 1/4 BGAP 1/2 BGAP 3/4 BGAP and BGAP voltage
references are available.
These bits select which timer output controls the comparator 2 output blanking.
000: No blanking
100: TIM15 OC1 selected as blanking source
All other values: reserved
These bits are set and cleared by software (only if LOCK not set). Select the hysteresis
voltage of the comparator 2.
00: No hysteresis
01: Low hysteresis
10: Medium hysteresis
11: High hysteresis
This bit is set and cleared by software (only if LOCK not set). It inverts Comparator 2
polarity.
0: Comparator 2 output value not inverted
1: Comparator 2 output value inverted
This bit is set and cleared by software (only if LOCK not set). This bit selects the window
mode of the comparators. If set, both positive inputs of comparators will be connected
together.
0: Input plus of Comparator 2 is not connected to Comparator 1
1: Input plus of Comparator 2 is connected with input plus of Comparator 1
This bit is set and cleared by software (only if LOCK not set).
0: PB4
1: PB6
RM0432 Rev 6
RM0432