Silicon Labs R suffix for EFM32 Giant Gecko series

Semiconductor Integrated Circuits (ICs)
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An example part number for the EFM32 Giant Gecko series EFM32 will be EFM32GG280F512G-E-QFP100R

This information is located on the data sheet, page number 5.

EFM32GG Data Sheet (silabs.com)

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