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STM32F303VCT6 Fiches technique(PDF) 92 Page - STMicroelectronics |
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STM32F303VCT6 Fiches technique(HTML) 92 Page - STMicroelectronics |
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92 / 132 page ![]() Electrical characteristics STM32F302xx/STM32F303xx 92/132 DocID023353 Rev 6 Figure 23. 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 22. 10% 90% 50% tr(IO)out UT NAL pF 10% 50% 90% T tr(IO)out 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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