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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32F401CDU6 датащи(PDF) 96 Page - STMicroelectronics |
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STM32F401CDU6 датащи(HTML) 96 Page - STMicroelectronics |
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96 / 135 page  Electrical characteristics STM32F401xD STM32F401xE 96/135 Figure 31. I/O AC characteristics definition 6.3.17 NRST pin characteristics The NRST pin input driver uses CMOS technology. It is connected to a permanent pull-up resistor, RPU (see Table 54). Unless otherwise specified, the parameters given in Table 57 are derived from tests performed under the ambient temperature and VDD supply voltage conditions summarized in Table 14. Refer to Table 54: I/O static characteristics for the values of VIH and VIL for NRST pin. Table 57. NRST pin characteristics Symbol Parameter Conditions Min Typ Max Unit RPU Weak pull-up equivalent resistor(1) VIN = VSS 30 40 50 k Ω VF(NRST)(2) NRST Input filtered pulse - - 100 ns VNF(NRST)(2) NRST Input not filtered pulse VDD > 2.7 V 300 - - ns TNRST_OUT Generated reset pulse duration Internal Reset source 20 - - µs 1. 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) . 2. Guaranteed by design, not tested in production. |
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