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STM32F410RB датащи(PDF) 97 Page - STMicroelectronics |
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STM32F410RB датащи(HTML) 97 Page - STMicroelectronics |
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97 / 142 page ![]() DocID028094 Rev 5 97/142 STM32F410x8/B Electrical characteristics 118 Figure 28. 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 55). Unless otherwise specified, the parameters given in Table 58 are derived from tests performed under the ambient temperature and VDD supply voltage conditions summarized in Table 15. Refer to Table 55: I/O static characteristics for the values of VIH and VIL for NRST pin. Table 58. 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. |
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