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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32F071C8 датащи(PDF) 67 Page - STMicroelectronics |
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STM32F071C8 датащи(HTML) 67 Page - STMicroelectronics |
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67 / 122 page  DocID025451 Rev 5 67/122 STM32F071x8 STM32F071xB Electrical characteristics 96 Figure 16. Typical application with an 8 MHz crystal 1. REXT value depends on the crystal characteristics. Low-speed external clock generated from a crystal resonator The low-speed external (LSE) clock can be supplied with a 32.768 kHz crystal resonator oscillator. All the information given in this paragraph are based on design simulation results obtained with typical external components specified in Table 40. In the application, 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 startup stabilization time. Refer to the crystal resonator manufacturer for more details on the resonator characteristics (frequency, package, accuracy). Table 40. LSE oscillator characteristics (fLSE = 32.768 kHz) Symbol Parameter Conditions(1) Min(2) Typ Max(2) Unit IDD LSE current consumption LSEDRV[1:0]=00 lower driving capability -0.5 0.9 µA LSEDRV[1:0]= 01 medium low driving capability -- 1 LSEDRV[1:0] = 10 medium high driving capability -- 1.3 LSEDRV[1:0]=11 higher driving capability -- 1.6 |
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