General-purpose timers (TIM15/TIM16/TIM17) RM0440
1344/2126 RM0440 Rev 4
30 General-purpose timers (TIM15/TIM16/TIM17)
30.1 TIM15/TIM16/TIM17 introduction
The TIM15/TIM16/TIM17 timers consist of a 16-bit auto-reload counter driven by a
programmable prescaler.
They 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 TIM15/TIM16/TIM17 timers are completely independent, and do not share any
resources. TIM15 can be synchronized as described in Section 30.4.25: Timer
synchronization (TIM15).
30.2 TIM15 main features
TIM15 includes the following features:
• 16-bit auto-reload upcounter
• 16-bit programmable prescaler used to divide (also “on the fly”) the counter clock
frequency by any factor between 1 and 65535
• Up to 2 independent channels for:
– Input capture
– Output compare
– PWM generation (edge mode)
– One-pulse mode output
• Complementary outputs with programmable dead-time (for channel 1 only)
• 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 the reset state or a known state
• Interrupt/DMA generation on the following events:
– Update: counter overflow, 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 (interrupt request)
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