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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32F318C8 датащи(PDF) 84 Page - STMicroelectronics |
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STM32F318C8 датащи(HTML) 84 Page - STMicroelectronics |
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84 / 125 page  Electrical characteristics STM32F318C8 STM32F318K8 84/125 DocID026294 Rev 5 Figure 21. Recommended NRST pin protection 1. The reset network protects the device against parasitic resets. 2. The user must ensure that the level on the NRST pin can go below the VIL(NRST) max level specified in Table 51 . Otherwise the reset will not be taken into account by the device. 6.3.15 NPOR pin characteristics The NPOR pin input driver uses the CMOS technology. It is connected to a permanent pull- up resistor, Rpu (see Table 52) connected to VDDA supply. Unless otherwise specified, the parameters given in Table 52 are derived from tests performed under ambient temperature and VDDA supply voltage conditions summarized in Table 20 . Table 52. NPOR pin characteristics Symbol(1) Parameter Conditions Min Typ Max Unit VIL(NPOR) NPOR Input low level voltage -- - 0.475 VDDA - 0.2 V VIH(NPOR) NPOR Input low level voltage - 0.5 VDDA +0.2 -- Vhys(NPOR) NPOR Schmitt trigger voltage hysteresis - - 100 - mV RPU Weak pull-up equivalent resistor(2) VIN = VSS 25 40 55 k 1. Guaranteed by design, not tested in production. 2. The pull-up is designed with a true resistance in series with a switchable PMOS. This PMOS contribution to the series resistance is minimal (~10% order). |
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