RM0390 Rev 4 449/1328
RM0390 Advanced-control timers (TIM1&TIM8)
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16 Advanced-control timers (TIM1&TIM8)
16.1 TIM1&TIM8 introduction
The advanced-control timers (TIM1&TIM8) consist 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 length 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&TIM8) and general-purpose (TIMx) timers are completely
independent, and do not share any resources. They can be synchronized together as
described in Section 16.3.20.
16.2 TIM1&TIM8 main features
TIM1&TIM8 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 65536.
• 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
• Supports incremental (quadrature) encoder and Hall-sensor circuitry for positioning
purposes
• Trigger input for external clock or cycle-by-cycle current management
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