UM0306 Advanced control timer (TIM1)
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12 Advanced control timer (TIM1)
12.1 Introduction
The Advanced Control Timer (TIM1) consists of a 16-bit auto-reload counter driven by a
programmable prescaler.
It may be used for a variety of purposes, including measuring the pulse lengths of input
signals (input capture) or generating output waveforms (output compare, PWM,
complementary PWM with dead-time insertion...).
Pulse lengths and waveform periods can be modulated from a few microseconds to several
milliseconds using the timer prescaler and the RCC clock controller prescalers.
The advanced control (TIM1) and general purpose (TIMx) timers are completely
independent, and do not share any resources. They can be synchronized together as
described in Section 12.4.20.
12.2 Main features
TIM1 timer features include:
● 16-bit up, down, up/down auto-reload counter.
● 16-bit programmable prescaler allowing dividing (also “on the fly”) the counter clock
frequency either by any factor between 1 and 65535.
● Up to 4 independent channels for:
– Input Capture
– Output Compare
– PWM generation (Edge and Center-aligned Mode)
– One Pulse Mode output
– Complementary Outputs with programmable dead-time
● Synchronization circuit to control the timer with external signals and to interconnect
several timers together.
● Repetition counter to update the timer registers only after a given number of cycles of
the counter.
● Break input to put the timer’s output signals in reset state or in a known state.
● Interrupt/DMA generation on the following events:
– Update: counter overflow/underflow, counter initialization (by software or
internal/external trigger)
– Trigger event (counter start, stop, initialization or count by internal/external trigger
– Input capture
– Output compare
– Break input
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