Datasheet

DocID030538 Rev 3 179/226
STM32H743xI Electrical characteristics
196
6.3.31 Timer characteristics
The parameters given in Table 99 are guaranteed by design.
Refer to Section 6.3.15: I/O port characteristics for details on the input/output alternate
function characteristics (output compare, input captur
e, external clock, PWM output).
Table 99. TIMx characteristics
(1)(2)
1. TIMx is used as a general term to refer to the TIM1 to TIM17 timers.
2. Guaranteed by design.
Symbol Parameter
Conditions
(3)
3. The maximum timer frequency on APB1 or APB2 is up to 200 MHz, by setting the TIMPRE bit in the
RCC_CFGR register, if APBx prescaler is 1 or 2 or 4, then TIMxCLK = rcc_hclk1, otherwise TIMxCLK = 4x
F
rcc_pclkx_d2
.
Min Max Unit
t
res(TIM)
Timer resolution time
AHB/APBx prescaler=1
or 2 or 4, f
TIMxCLK
=
200 MHz
1-
t
TIMxCLK
AHB/APBx
prescaler>4, f
TIMxCLK
=
100 MHz
1-
t
TIMxCLK
f
EXT
Timer external clock
frequency on CH1 to CH4
f
TIMxCLK
= 200 MHz
0
f
TIMxCLK
/2
MHz
Res
TIM
Timer resolution - 16/32 bit
t
MAX_COUNT
Maximum possible count
with 32-bit counter
--
65536 ×
65536
t
TIMxCLK
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