STM32 Clock study notes (2010-01-27 09:23:15) reproduced Tags: Zatan Category: Embedded in the STM32, five of the clock source for the HSI, HSE, LSI, LSE, PLL. ①, HSI is a high-speed internal clock 8M, RC oscillator frequency is 8MHz. ②, HSE is a high-speed external clock, which can be accessed quartz/ceramic resonator or external clock source connected, the frequency range of 4MHz ~ 16MHz. ③, LSI is the low-speed internal clock, RC oscillator, a frequency of 40kHz. ④, LSE is a low-speed external clock, then a frequency of 32.768kHz quartz crystal. ⑤, PLL output frequency for the PLL, the clock input source option for the HSI/2, HSE or HSE/2. Selectable frequency of 2 to 16 times, but its maximum output frequency must not exceed 72MHz.

EKSTM3210_v5_examples.exe

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