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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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STM32WB15CC Scheda tecnica(PDF) 21 Page - STMicroelectronics |
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STM32WB15CC Scheda tecnica(HTML) 21 Page - STMicroelectronics |
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21 / 127 page  DS13258 Rev 4 21/127 STM32WB15CC Functional overview 45 Figure 3. External components for the RF part Note: For more details refer to AN5165 “Development of RF hardware using STM32WB microcontrollers” available on www.st.com. 3.7 Power supply management 3.7.1 Power supply distribution The device integrate an SMPS step-down converter to improve low power performance when the VDD voltage is high enough. This converter has an intelligent mode that automatically enters in bypass mode when the VDD voltage falls below a specific BORx (x = 1, 2, 3 or 4) voltage. By default, at Reset the SMPS is in bypass mode. The device can be operated without the SMPS by just wiring its output to VDD. This is the case for applications where the voltage is low, or where the power consumption is not critical. Table 4. Typical external components Component Description Value C1 Decoupling capacitance for RF 100 nF // 100 pF X1 32 MHz crystal(1) 1. e.g. NDK reference: NX2016SA 32 MHz EXS00A-CS06654. 32 MHz Antenna filter Antenna filter and matching network Refer to AN5165, on www.st.com Antenna 2.4 GHz band antenna - MS53575V1 STM32WB microcontroller VDD OSC_IN OSC_OUT VDDRF VSSRF RF1 Antenna Cf1 Cf2 Lf1 Lf2 X1 C1 Antenna filter (including exposed pad) 32 MHz |
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