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RM0440 Rev 4 821/2126

RM0440 Operational amplifiers (OPAMP)

829

Bit 3 T1CM_EN: TIM1 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. This automatic switch is triggered by the

TIM1 CC6 output arriving on the OPAMP3 input multiplexers.

0: Automatic switch is disabled.

1: Automatic switch is enabled.

Bits 2:1 VPS_SEL: OPAMP3 Non inverting input secondary selection.

These bits are set and cleared by software. They are used to select the OPAMP3 non

inverting input when the controlled mux mode is enabled (T1CM_EN = 1 or T8CM_EN = 1 or

T20CM_EN = 1)

00: VINP0 pin connected to OPAMP3 VINP input

01: VINP1 pin connected to OPAMP3 VINP input

10: VINP2 pin connected to OPAMP3 VINP input

11: DAC3_CH2 connected to OPAMP3 VINP input

Bits 0 VMS_SEL: OPAMP3 inverting input secondary selection

This bit is set and cleared by software. It is used to select the OPAMPx inverting input when the

controlled mux mode is enabled (T1CM_EN = 1 or T8CM_EN = 1 or T20CM_EN = 1)

When standalone mode is used (i.e. VM_SEL = “00” or “01”):

0: Input from VINM0

1: Input from VINM1

When PGA (VM_SEL = “10”) or Follower mode (VM_SEL = “11”) is used:

0: Resistor feedback output selected (PGA mode)

1: V

OUT

selected as input minus (follower mode)

ST STM32G491 User Manual

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