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STM32F103RCT6 Datasheet(PDF) 94 Page - STMicroelectronics |
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STM32F103RCT6 Datasheet(HTML) 94 Page - STMicroelectronics |
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94 / 143 page  Electrical characteristics STM32F103xC, STM32F103xD, STM32F103xE 94/143 DS5792 Rev 13 Figure 46. I/O AC characteristics definition 5.3.15 NRST pin characteristics The NRST pin input driver uses CMOS technology. It is connected to a permanent pull-up resistor, RPU (see Table 46). Unless otherwise specified, the parameters given in Table 49 are derived from tests performed under ambient temperature and VDD supply voltage conditions summarized in Table 10. Table 49. NRST pin characteristics Symbol Parameter Conditions Min Typ Max Unit VIL(NRST)(1) 1. Guaranteed by design. NRST Input low level voltage - –0.5 - 0.8 V VIH(NRST)(1) NRST Input high level voltage - 2 - VDD+0.5 Vhys(NRST) NRST Schmitt trigger voltage hysteresis - - 200 - mV RPU Weak pull-up equivalent resistor(2) 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) . VIN = VSS 30 40 50 k Ω VF(NRST)(1) NRST Input filtered pulse - - - 100 ns VNF(NRST)(1) NRST Input not filtered pulse - 300 - - ns |
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