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STM32 clock configuration

Question asked by Yi.Haohao on Jul 14, 2015
Latest reply on Jul 18, 2015 by Yi.Haohao
I am a beginner in STM32. Recently I surf the Internet and find some codes written by others. They all says that the RCC should be configured at first as follow:
1. Reset the RCC register;
2. Open HSE;
3. Wait for HSE start up;
5. RCC_PCLK2Config;
6. RCC_PCLK1Config;
7. RCC_PLLConfig;
8. Rcc_PLLCmd(ENABLE);
9. Wait for PLL to work;
10. RCC_SYSCLKConfig;
11. Determine that whether PLL is the system clock;
12. Open the peripheral's clock.

But how can I know these procedures from the reference manual or the datasheet?