Tim5 Functional Description; Time-Base Unit; Figure 97. General-Purpose Timer Block Diagram - ST STM32F410 Reference Manual

RM0401
15.3

TIM5 functional description

15.3.1

Time-base unit

The main block of the programmable timer is a 32-bit counter with its related auto-reload
register. The counter can count up. The counter clock can be divided by a prescaler.
The counter, the auto-reload register and the prescaler register can be written or read by
software. This is true even when the counter is running.
The time-base unit includes:
•
Counter Register (TIMx_CNT)
•
Prescaler Register (TIMx_PSC):
•
Auto-Reload Register (TIMx_ARR)
The auto-reload register is preloaded. Writing to or reading from the auto-reload register
accesses the preload register. The content of the preload register are transferred into the
shadow register permanently or at each update event (UEV), depending on the auto-reload
preload enable bit (ARPE) in TIMx_CR1 register. The update event is sent when the counter
reaches the overflow (or underflow when downcounting) and if the UDIS bit equals 0 in the
TIMx_CR1 register. It can also be generated by software. The generation of the update
event is described in detail for each configuration.

Figure 97. General-purpose timer block diagram

RM0401 Rev 3
General-purpose timers (TIM5)
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