AN4651 datasheet(25/34 Pages) STMICROELECTRONICS

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AN4651

Interconnection descriptions

3.10

From TIM to COMP

For all STM32F3 series devices except STM32F37x devices, the timers output can be

selected as comparators outputs blanking signals using the “COMPx_BLANKING” bits in

“COMPx_CSR” register.

3.11

From DAC to COMP

For all STM32F3 series devices except STM32F37x devices, the comparators inverting

input may be a DAC channel output (DAC1_CH1 or DAC1_CH2). DAC2_CH1 may be

selected for COMP2, COMP4 and COMP6 in case the device belongs to STM32F303x6/8

or STM32F328x8 families.

“COMPxINMSEL” bits value in “COMPx_CSR” register are used for the selection.

Table 11 details the interconnections between DAC and COMP.

Table 10. Timer outputs used as comparators blanking sources(1)

COMP blanking source

COMP1

COMP2

COMP3

COMP4

COMP5

COMP6

COMP7

TIM1

TIM1 OC5

TIM8

TIM8 OC5

TIM15

TIM15 OC1

TIM15 OC2

TIM2

TIM2 OC3

TIM2 OC4

TIM3

TIM3 OC3

TIM3 OC4

TIM3 OC3

The gray shading in table cells means Not Applicable.

Table 11. DAC output selection as comparator inverting input(1)

The gray shading in table cells means Not Applicable.

COMP inverting inputs

COMP1(2)

For STM32F37x products, COMP1 and COMP2 inverting input may be DAC1_CH1, DAC1_CH2 or

DAC2_CH1 output. The selection is made based on COMPxINSEL (x=1,2) bits value in COMP_CSR

COMP2(2)

COMP3

COMP4

COMP5

COMP6

COMP7

DAC1_CH1

XXX

DAC1_CH2

XXX

DAC2_CH1

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