EFM32WG890 Datasheet, PDF (76/85 Pages) Silicon Laboratories – Operation from backup battery when main power drains out

...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 (top view)
6.2 Revision
The revision of a chip can be determined from the "Revision" field in Figure 6.1 (p. 76) .
6.3 Errata
Please see the errata document for EFM32WG890 for description and resolution of device erratas. This
document is available in Simplicity Studio and online at:
http://www.silabs.com/support/pages/document-library.aspx?p=MCUs--32-bit
2014-06-13 - EFM32WG890FXX - d0198_Rev1.40
76
www.silabs.com