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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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STM32F412RG Arkusz danych(PDF) 122 Page - STMicroelectronics |
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STM32F412RG Arkusz danych(HTML) 122 Page - STMicroelectronics |
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122 / 193 page  Electrical characteristics STM32F412xE/G 122/193 DocID028087 Rev 4 Figure 36. 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 56). Unless otherwise specified, the parameters given in Table 59 are derived from tests performed under the ambient temperature and VDD supply voltage conditions summarized in Table 15. Refer to Table 56: I/O static characteristics for the values of VIH and VIL for NRST pin. Table 59. 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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