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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) 83 Page - STMicroelectronics |
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STM32F318C8 датащи(HTML) 83 Page - STMicroelectronics |
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83 / 125 page  DocID026294 Rev 5 83/125 STM32F318C8 STM32F318K8 Electrical characteristics 107 Figure 20. I/O AC characteristics definition 1. See Table 50: I/O AC characteristics. 6.3.14 NRST pin characteristics The NRST pin input driver uses CMOS technology. It is connected to a permanent pull-up resistor, RPU (see Table 48). Unless otherwise specified, the parameters given in Table 51 are derived from tests performed under ambient temperature and VDD supply voltage conditions summarized in Table 20 . Table 51. NRST pin characteristics Symbol Parameter Conditions Min Typ Max Unit VIL(NRST)(1) NRST Input low level voltage - - - 0.3VDD+ 0.07(1) V VIH(NRST)(1) NRST Input high level voltage - 0.445VDD+ 0.398(1) -- Vhys(NRST) NRST Schmitt trigger voltage hysteresis - - 200 - mV RPU Weak pull-up equivalent resistor(2) VIN VSS 25 40 55 k VF(NRST)(1) NRST Input filtered pulse - - - 100(1) ns VNF(NRST)(1) NRST Input not filtered pulse - 700(1) -- ns 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 must be minimum (~10% order) . |
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