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STM32F303C6 Datasheet(PDF) 80 Page - STMicroelectronics |
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STM32F303C6 Datasheet(HTML) 80 Page - STMicroelectronics |
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80 / 115 page ![]() Electrical characteristics STM32F303x6/x8 80/115 DocID025083 Rev 5 Figure 22. I/O AC characteristics definition 6.3.15 NRST pin characteristics The NRST pin input driver uses CMOS technology. It is connected to a permanent pull-up resistor, RPU (see Table 52). Unless otherwise specified, the parameters given in Table 55 are derived from tests performed under ambient temperature and VDD supply voltage conditions summarized in Table 20. Table 55. 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 Ω VF(NRST)(1) NRST Input filtered pulse - - - 100(1) ns VNF(NRST)(1) NRST Input not filtered pulse - 500(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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