Datasheet

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STM32H743xI Functional overview
46
3.28.1 High-resolution timer (HRTIM1)
The high-resolution timer (HRTIM1) allows generating digital signals with high-accuracy
timings, such as PWM or phase-shifted pulses.
It consists of 6 timers, 1 master and 5 slaves,
totaling 10 high-resolution outputs, which can
be coupled by pairs for deadtime insertion. It also features 5 fault inputs for protection
purposes and 10 inputs to handle external events such as current limitation, zero voltage or
zero current switching.
The HRTIM1 timer is made of a digital kernel clocked at 400 MHz The high-resolution is
a
vailable on the 10 outputs in all operating modes: variable duty cycle, variable frequency,
and constant ON time.
The slave timers can be combined to control multiswitch comp
lex converters or operate
independently to manage multiple independent converters.
The waveforms are defined by a combination of user
-defined timings and external events
such as analog or digital feedbacks signals.
HRTIM1 timer includes options for blanking and filter
ing out spurious events or faults. It also
offers specific modes and features to offload the CPU: DMA requests, burst mode controller,
push-pull and resonant mode.
It supports many topologies including LLC, Fu
ll bridge phase shifted, buck or boost
converters, either in voltage or current mode, as well as lighting application (fluorescent or
LED). It can also be used as a general purpose timer, for instance to achieve high-resolution
PWM-emulated DAC.
Basic
TIM6,
TIM7
16-bit Up
Any
integer
between 1
and
65536
Yes 0 No 100 200
Low-
power
timer
LPTIM1,
LPTIM2,
LPTIM3,
LPTIM4,
LPTIM5
16-bit Up
1, 2, 4, 8,
16, 32, 64,
128
No 0 No 100 200
1. The maximum timer clock is up to 400 MHz depending on TIMPRE bit in the RCC_CFGR register and D2PRE1/2 bits in
RCC_D2CFGR register.
Table 5. Timer feature comparison (continued)
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)
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