Input Capture Mode; Figure 147. Capture/Compare Channel 1 Main Circuit; Figure 148. Output Stage Of Capture/Compare Channel (Channel 1) - ST STM32F410 Reference Manual

RM0401
The capture/compare block is made of one preload register and one shadow register. Write
and read always access the preload register.
In capture mode, captures are actually done in the shadow register, which is copied into the
preload register.
In compare mode, the content of the preload register is copied into the shadow register
which is compared to the counter.
16.3.5

Input capture mode

In Input capture mode, the Capture/Compare Registers (TIMx_CCRx) are used to latch the
value of the counter after a transition detected by the corresponding ICx signal. When a
capture occurs, the corresponding CCXIF flag (TIMx_SR register) is set and an interrupt or
a DMA request can be sent if they are enabled. If a capture occurs while the CCxIF flag was
already high, then the over-capture flag CCxOF (TIMx_SR register) is set. CCxIF can be

Figure 147. Capture/compare channel 1 main circuit

Figure 148. Output stage of capture/compare channel (channel 1)

General-purpose timers (TIM9 and TIM11)
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