link to page 9 STM32WB5MMGRecommendations5Recommendations5.1Pin recommendations • ANT_IN and RF_OUT pins must be connected to GND. This module already integrates an antenna, so no external antenna required. • The ANT_NC is only used for soldering planarity purposes. So this pin must be soldered to an unconnected pin on the customer board. • A reset pull-up is already implemented in the STM32WB Series microcontrollers. The reset circuitry only requires an external capacitor for filtering purpose (see Figure 3). Figure 3. Reset circuit STM32WB5MMG PC2 8 9 PC1 10 To reset mechanism NRST 100nF 11 PB9 12 PC0DS13252 - Rev 1page 9/31 Document Outline 1 Introduction 2 Description 3 Available peripherals 4 Pin description 5 Recommendations 5.1 Pin recommendations 5.2 Layout recommendations 5.2.1 STM32WB5MMG placement 5.2.2 Enclosure effects 5.2.3 Ground plane 5.2.4 Sensitive GPIOs 5.2.5 Four layer reference board design 6 Electrical characteristics 6.1 Operating conditions 6.2 Power consumption 6.3 RF characteristics 6.4 Antenna radiation patterns and efficiency 7 Thermal characteristics 8 Solder re-flow recommendation 9 Package information 9.1 SiP-LGA86 package information 9.1.1 Device marking for SiP-LGA86 10 Ordering information 11 Tape and reel packing 12 Certification 12.1 CE certification 12.2 FCC certification 12.3 ISED certification 12.4 JRF certification 12.5 NCC certification 12.6 SRRC certification Revision history Contents List of tables List of figures
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