Opamp Registers; Opamp1 Control Register (Opamp1_Csr) - STMicroelectronics RM0365 Reference Manual

Operational amplifier (OPAMP)
18.4

OPAMP registers

18.4.1

OPAMP1 control register (OPAMP1_CSR)

Note: This register is only available in STM32F302xB/C/D/E devices.
Address offset : 0x38
Reset value: 0xXXXX 0000
31 30 29
TSTR
LOCK OUTCAL
EF
rw r rw
15 14 13
PGA_GAIN CALSEL
rw rw
Bit 31 LOCK: OPAMP 1 lock
This bit is write-once. It is set by software. It can only be cleared by a system reset.
This bit is used to configure the OPAMP1_CSR register as read-only.
0: OPAMP1_CSR is read-write.
1: OPAMP1_CSR is read-only.
Bit 30 OUTCAL:
OPAMP output status flag, when the OPAMP is used as comparator during calibration.
0: Non-inverting < inverting
1: Non-inverting > inverting.
Bit 29 TSTREF:
This bit is set and cleared by software. It is used to output the internal reference voltage
(V
REFOPAMP1
0: V
REFOPAMP1
1: V
REFOPAMP1
Bits 28:24 TRIMOFFSETN: Offset trimming value (NMOS)
Bits 23:19 TRIMOFFSETP: Offset trimming value (PMOS)
Bit 18 USER_TRIM: User trimming enable.
This bit is used to configure the OPAMP offset.
0: User trimming disabled.
1: User trimming enabled.
431/1080
28 27 26 25
TRIMOFFSETN
rw
12 11 10 9
CAL
VPS_SEL
ON
rw rw
).
is output.
is not output.
DocID025202 Rev 7
24 23 22
TRIMOFFSETP
8 7 6
VMS_SE TCM_
VM_SEL
L EN
rw rw rw
21 20 19 18
USER_
TRIM
rw rw
5 4 3 2
Res. VP_SEL
rw
RM0365
17 16
PGA_GAIN
rw
1 0
FORCE OPAMP
_VP 1EN
rw rw