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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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RM0016 датащи(PDF) 80 Page - STMicroelectronics |
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RM0016 датащи(HTML) 80 Page - STMicroelectronics |
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80 / 467 page  Clock control (CLK) RM0016 80/467 DocID14587 Rev 14 9.1 Master clock sources 4 different clock sources can be used to drive the master clock: • 1-24 MHz high speed external crystal oscillator (HSE) • Up to 24 MHz high speed user-external clock (HSE user-ext) • 16 MHz high speed internal RC oscillator (HSI) • 128 kHz low speed internal RC (LSI) Each clock source can be switched on or off independently when it is not used, to optimize power consumption. 9.1.1 HSE (high-speed external) clock signal The high speed external clock signal (HSE) can be generated from two possible clock sources: • HSE external crystal/ceramic resonator • HSE user external clock Figure 21. HSE clock sources The resonator and the load capacitors have to be placed as close as possible to the oscillator pins in order to minimize output distortion and start-up stabilization time. The loading capacitance values must be adjusted according to the selected oscillator. |
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