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STM32WB15CC датащи(PDF) 102 Page - STMicroelectronics |
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STM32WB15CC датащи(HTML) 102 Page - STMicroelectronics |
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102 / 127 page ![]() Electrical characteristics STM32WB15CC 102/127 DS13258 Rev 4 Figure 21. Recommended NRST pin protection 1. The reset network protects the device against parasitic resets. 2. The user must ensure that the level on the NRST pin can go below the VIL(NRST) max level specified in Table 67, otherwise the reset is not taken into account by the device. 3. The external capacitor on NRST must be placed as close as possible to the device. Table 67. NRST pin characteristics(1) 1. Specified by design, not tested in production. Symbol Parameter Conditions Min Typ Max Unit VIL(NRST) NRST input low level voltage - - - 0.3 x VDD V VIH(NRST) NRST input high level voltage - 0.7 x VDD -- 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 is minimal (~10%) . VIN = VSS 25 40 55 kΩ VF(NRST) NRST input filtered pulse -- - 70 ns VNF(NRST) NRST input not filtered pulse 1.71 V ≤ VDD ≤ 3.6 V 350 - - MS19878V3 RPU VDD Internal reset External reset circuit (1) NRST (2) Filter 0.1 μF |
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