Devices EFM32PG28 Series EFM32PG28 Series Silicon Labs Devices 4 EFM32PG28B200F512IM68 EFM32PG28B200 Cortex-M33 EFM32PG28B210F1024IM68 EFM32PG28B210 Cortex-M33 EFM32PG28B300F512IM68 EFM32PG28B300 Cortex-M33 EFM32PG28B310F1024IM68 EFM32PG28B310 Cortex-M33