Datasheet
DocID027107 Rev 6 31/202
STM32F446xC/E Functional overview
40
3.21 Timers and watchdogs
The devices include two advanced-control timers, eight general-purpose timers, two basic
timers and two watchdog timers.
All timer counters can be frozen in debug mode.
Table 6 compares the features of the advanced-control, general-purpose and basic timers.
Table 6. Timer feature comparison
Timer
type
Timer
Counter
resolution
Counter
type
Prescaler
factor
DMA
request
generation
Capture/
compare
channels
Complementary
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 4 Yes 90 180
General
purpose
TIM2,
TIM5
32-bit
Up,
Down,
Up/down
Any integer
between 1
and 65536
Yes 4 No 45 90/180
TIM3,
TIM4
16-bit
Up,
Down,
Up/down
Any integer
between 1
and 65536
Yes 4 No 45 90/180
TIM9 16-bit Up
Any integer
between 1
and 65536
No 2 No 90 180
TIM10,
TIM11
16-bit Up
Any integer
between 1
and 65536
No 1 No 90 180
TIM12 16-bit Up
Any integer
between 1
and 65536
No 2 No 45 90/180
TIM13,
TIM14
16-bit Up
Any integer
between 1
and 65536
No 1 No 45 90/180
Basic
TIM6,
TIM7
16-bit Up
Any integer
between 1
and 65536
Yes 0 No 45 90/180
1. The maximum timer clock is either 90 or 180 MHz depending on TIMPRE bit configuration in the RCC_DCKCFGR
register.
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