STM32H7B3AI datasheet(27/238 Pages) STMICROELECTRONICS

27 / 238 page

•

Support for STM32 Octo-SPI prefetching mechanism.

•

Encryption mode

3.34

Timers and watchdogs

The devices include two advanced-control timers, ten general-purpose timers, two basic timers, three low-power

timers, two watchdogs and a SysTick timer.

All timer counters can be frozen in Debug mode.

Table 4. Timer feature comparison compares the features of the advanced-control, general-purpose and basic

timers.

Table 4. Timer feature comparison

Timer type

Timer

Counter

resolution

Counter

type

Prescaler factor

DMA

request

generation

Capture/

compare

channels

Comple-

mentary

output

Max

interface

clock

(MHz)

Max

timer

clock

(MHz)

(1)

Advanced-

control

TIM1,

TIM8

16-bit

Up, Down,

Up/down

Any integer

between 1 and

65536

Yes

140

280

General

purpose

TIM2,

TIM5

32-bit

Up, Down,

Up/down

Any integer

between 1 and

65536

Yes

140

280

TIM3,

TIM4

16-bit

Up, Down,

Up/down

Any integer

between 1 and

65536

Yes

140

280

TIM12

16-bit

Any integer

between 1 and

65536

140

280

TIM13,

TIM14

16-bit

Any integer

between 1 and

65536

140

280

TIM15

16-bit

Any integer

between 1 and

65536

Yes

140

280

TIM16,

TIM17

16-bit

Any integer

between 1 and

65536

Yes

140

280

Basic

TIM6,

TIM7

16-bit

Any integer

between 1 and

65536

Yes

140

280

Low-power

timer

LPTIM1,

LPTIM2,

LPTIM3

16-bit

1, 2, 4, 8, 16, 32,

64, 128

140

280

1. The maximum timer clock is up to 280 MHz depending on TIMPRE bit in the RCC_CFGR register and CDPRE1/2 bits in RCC_CDCFGR

3.34.1

Advanced-control timers (TIM1, TIM8)

The advanced-control timers (TIM1, TIM8) can be seen as three-phase PWM generators multiplexed on 6

channels. They have complementary PWM outputs with programmable inserted dead times. They can also be

considered as complete general-purpose timers. Their 4 independent channels can be used for:

•

Input capture

•

Output compare

•

PWM generation (edge- or center-aligned modes)

•

One-pulse mode output

STM32H7B3xI

Timers and watchdogs

DS13139 - Rev 8

page 27/238

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