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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32F101XB датащи(PDF) 60 Page - STMicroelectronics |
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STM32F101XB датащи(HTML) 60 Page - STMicroelectronics |
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60 / 101 page  Electrical characteristics STM32F101x8, STM32F101xB 60/101 DocID13586 Rev 17 Figure 27. I/O AC characteristics definition 5.3.14 NRST pin characteristics The NRST pin input driver uses CMOS technology. It is connected to a permanent pull-up resistor, RPU (see Table 33). Unless otherwise specified, the parameters given in Table 36 are derived from tests performed under the ambient temperature and VDD supply voltage conditions summarized in Table 8. Table 36. NRST pin characteristics Symbol Parameter Conditions Min Typ Max Unit VIL(NRST)(1) 1. Guaranteed by design, not tested in production. NRST Input low level voltage - –0.5 - 0.8 V VIH(NRST)(1) NRST Input high level voltage - 2 - VDD+0.5 Vhys(NRST) NRST Schmitt trigger voltage hysteresis - - 200 - 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 must be minimum (~10% order) . VIN VSS 30 40 50 k VF(NRST)(1) NRST Input filtered pulse - - - 100 ns VNF(NRST)(1) NRST Input not filtered pulse - 300 - - ns |
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