EFM32WG980 Datasheet, PDF (72/80 Pages) List of Unclassifed Manufacturers – The EFM32 MCUs are the world’s most energy friendly microcontrollers.

Preliminary
...the world's most energy friendly microcontrollers
6 Chip Marking, Revision and Errata
6.1 Chip Marking
In the illustration below package fields and position are shown.
Figure 6.1. Example Chip Marking
6.2 Revision
The revision of a chip can be determined from the "Revision" field in Figure 6.1 (p. 72) . If the revision
says "ES" (Engineering Sample), the revision must be read out electronically as specified in the reference
manual.
6.3 Errata
Please see the dxxxx_efm32wg980_errata.pdf for description and resolution of device erratas. This doc-
ument is available in Simplicity Studio and online at http://www.energymicro.com/downloads/datasheets.
2013-05-06 - EFM32WG980FXX - d0202_Rev1.10
72
www.energymicro.com