STM32F302X8 datasheet(21/139 Pages) STMICROELECTRONICS

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DS9896 Rev 8

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STM32F302x6 STM32F302x8

Functional overview

3.14

Ultra-fast comparators (COMP)

The STM32F302x6/8 devices embed up to three ultra-fast rail-to-rail comparators which

offer the features below:

•

Programmable internal or external reference voltage

•

Selectable output polarity.

The reference voltage can be one of the following:

•

External I/O

•

DAC output

•

Internal reference voltage or submultiple (1/4, 1/2, 3/4). Refer to Table 27: Embedded

internal reference voltage for the value and precision of the internal reference voltage.

All comparators can wake up from STOP mode, and also generate interrupts and breaks for

the timers.

3.15

Timers and watchdogs

The STM32F302x6/8 devices include advanced control timer, up to general-purpose timers,

basic timer, two watchdog timers and a SysTick timer. Table 5 compares the features of the

advanced control, general purpose and basic timers.

Table 5. Timer feature comparison

Timer type

Timer

Counter

resolution

Counter

type

Prescaler

factor

DMA

request

generation

Capture/

compare

Channels

Complementary

outputs

Advanced

control

TIM1(1)

16-bit

Up, Down,

Up/Down

Any integer

between 1

and 65536

Yes

General-

purpose

TIM2

32-bit

Up, Down,

Up/Down

Any integer

between 1

and 65536

Yes

TIM15(1)

16-bit

Any integer

between 1

and 65536

Yes

TIM16(1),

TIM17(1)

16-bit

Any integer

between 1

and 65536

Yes

Basic

TIM6

16-bit

Any integer

between 1

and 65536

Yes

TIM1/15/16/17 can be clocked from the PLL running at 144 MHz when the system clock source is the PLL and AHB or

APB2 subsystem clocks are not divided by more than 2 cumulatively.

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