https://www.silabs.com/wireless/proprietary/efr32fg28-sub-ghz-wireless-socs/device.efr32fg28b312f1024im48?tab=softwareandtools
EFR32FG28B312F1024IM48 - Silicon Labs
EFR32FG28B312F1024IM48 include a ARM Cortex-M33 core, providing plenty of processing capability, while integrated security features provide fast encryption,...
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