Comp4 Control And Status Register (Comp4_Csr) - STMicroelectronics RM0365 Reference Manual

RM0365
17.5.3

COMP4 control and status register (COMP4_CSR)

Address offset: 0x28
Reset value: 0x0000 0000
31 30 29 28
COMP COMP
Res. Res.
4LOCK 4OUT
rwo r
15 14 13 12
COMP
Res. COMP4OUTSEL[3:0]
4POL
rw rw rw
1. Only in STM32F302xB/C.
Bit 31 COMP4LOCK: Comparator 4 lock
This bit is write-once. It is set by software. It can only be cleared by a system reset.
It allows to have COMP4_CSR register as read-only.
0: COMP4_CSR is read-write.
1: COMP4_CSR is read-only.
Bit 30 COMP4OUT: Comparator 4 output
This read-only bit is a copy of comparator 4 output state.
0: Output is low (non-inverting input below inverting input).
1: Output is high (non-inverting input above inverting input).
Bits 29: Reserved, must be kept at reset value.
Bits 20:18 COMP4_BLANKING: Comparator 4 blanking source
These bits select which Timer output controls the comparator 4 output blanking.
000: No blanking
001: TIM3 OC4 selected as blanking source
010: Reserved
011: TIM15 OC1 selected as blanking source
Other configurations: reserved, must be kept at reset value
Note: Depending on the product, when a timer is not available, the corresponding combination is
reserved.
Bits 17:16 COMP4HYST[1:0]: Comparator 4 Hysteresis
On the STM32F302xBC, these bits control the hysteresis level.
00: No hysteresis
01: Low hysteresis
10: Medium hysteresis
11: High hysteresis
Please refer to the electrical characteristics for the hysteresis values.
On the STM32F302x6/8 and STM32F302xD/E, , these bits are reserved and must be kept at reset
value.
Bit 15 COMP4POL: Comparator 4 output polarity
This bit is used to invert the comparator 4 output.
0: Output is not inverted
1: Output is inverted
Bit 14 Reserved, must be kept at reset value.
27 26 25 24
Res. Res. Res. Res.
11 10 9 8
Res. Res.
rw rw
DocID025202 Rev 7
23 22 21
Res. Res Res. COMP4_BLANKING[2:0]
7 6 5
COMP4
INPSEL
COMP4INMSEL[2:0]
(1)
rw rw rw
Comparator (COMP)
20 19 18 17
COMP4HYST
rw rw rw rw
4 3 2 1
COMP4MODE
Res.
(1)
[1:0]
rw rw rw
16
(1)
[1:0]
rw
0
COMP4
EN
rw
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