Figure 115. Output Stage Of Capture/Compare Channel (Channels 1 To 3); Figure 116. Output Stage Of Capture/Compare Channel (Channel 4) - ST STM32F423 Reference Manual

RM0430 Advanced-control timers (TIM1&TIM8)

Figure 115. Output stage of capture/compare channel (channels 1 to 3)

Figure 116. Output stage of capture/compare channel (channel 4)

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.
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