ST STM32F301 6 Series Reference Manual page 310

Operational amplifier (OPAMP)
Bits 13:12 CALSEL: Calibration selection
This bit is set and cleared by software. It is used to select the offset calibration bus used to generate
the internal reference voltage when CALON = 1 or FORCE_VP= 1.
V
00 =
REFOPAMP
V
01 =
REFOPAMP
V
10 =
REFOPAMP
V
11 =
REFOPAMP
Bit 11 CALON: Calibration mode enable
This bit is set and cleared by software. It is used to enable the calibration mode connecting VM and
VP to the OPAMP internal reference voltage.
0: calibration mode disabled.
1: calibration mode enabled.
Bits 10:9 VPS_SEL: OPAMP2 Non inverting input secondary selection.
These bits are set and cleared by software. They are used to select the OPAMP2 non inverting input
when TCM_EN = 1.
00: Reserved
01: PB14 used as OPAMP2 non inverting input
10: PB0 used as OPAMP2 non inverting input
11: PA7 used as OPAMP2 non inverting input
Bit 8 VMS_SEL: OPAMP2 inverting input secondary selection
This bit is set and cleared by software. It is used to select the OPAMP2 inverting input when
TCM_EN = 1.
0: PC5 (VM0) used as OPAMP2 inverting input
1: PA5 (VM1) used as OPAMP2 inverting input
Bit 7 TCM_EN: Timer controlled Mux mode enable.
This bit is set and cleared by software. It is used to control automatically the switch between the
default selection (VP_SEL and VM_SEL) and the secondary selection (VPS_SEL and VMS_SEL) of
the inverting and non inverting inputs.
Bits 6:5 VM_SEL: OPAMP2 inverting input selection.
Theses bits are set and cleared by software. They are used to select the OPAMP2 inverting input.
00: PC5 (VM0) used as OPAMP2 inverting input
01: PA5 (VM1) used as OPAMP2 inverting input
10: Resistor feedback output (PGA mode)
11: follower mode
Bit 4 Reserved, must be kept at reset value.
310/874
= 3.3% V
DDA
= 10% V
DDA
= 50% V
DDA
= 90% V
DDA
RM0366 Rev 5
RM0366