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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32F383RC датащи(PDF) 87 Page - STMicroelectronics |
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STM32F383RC датащи(HTML) 87 Page - STMicroelectronics |
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87 / 125 page  DocID023367 Rev 2 87/125 STM32F383xx Electrical characteristics 109 Figure 20. 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 52. Otherwise the reset will not be taken into account by the device. NPOR pin characteristics The NPOR pin input driver uses CMOS technology. It is connected to a permanent pull-up resistor to the VDDA, RPU (see Table 49). Unless otherwise specified, the parameters given in Table 53 are derived from tests performed under ambient temperature and VDDA supply voltage conditions summarized in Table 22. Table 53. NPOR pin characteristics Symbol Parameter Conditions Min Typ Max Unit VIL(NPOR)(1) 1. Guaranteed by design, not tested in production. NPOR Input low level voltage - - 0.475VDDA - 0.2 V VIH(NPOR)(1) NPOR Input high level voltage 0.5VDDA + 0.2 -- Vhys(NPOR)(1) NPOR Schmitt trigger voltage hysteresis -100 - mV RPU Weak pull-up equivalent resistor(2) 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). VIN = VSS 25 40 55 k Ω MS19878V1 RPU NRST(2) VDD Filter Internal Reset 0.1 μF External reset circuit(1) |
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