Figure 13. Stm32F302Xd/E Clock Tree - STMicroelectronics RM0365 Reference Manual

Reset and clock control (RCC)
1. For full details about the internal and external clock source characteristics, please refer to the Electrical
characteristics section in your device datasheet.
2. TIM1 can be clocked from the PLL running at 144 MHz when the system clock source is the PLL and AHB
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Figure 13. STM32F302xD/E clock tree

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RM0365