AN1377: EFR32xG21 Revision B to
Revision C+ Compatibility and Migration
Guide
This porting guide is for users migrating an existing EFR32BG21 or EFR32MG21 de-
sign from revision B to revision C+, hereafter respectively referred to as EFR32xG21-B
and EFR32xG21-C+
. Migration entails both hardware and software considerations.
KEY POINTS
• The EFR32xG21-C+ maintains a high
degree of pin and feature compatibility
with the EFR32xG21-B.
•
Migrating designs from EFR32xG21-B to
EFR32xG21-C+ requires no hardware
changes and minimal software changes.
• Data sheets for each device detail specific
performance metrics, which may differ
between EFR32xG21-B and EFR32xG21-
C+.
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1. Introduction
This application note highlights the differences between EFR32xG21-B and EFR32xG21-C+.
EFR32xG21-B devices include:
• EFR32xG21-B
EFR32xG21-C+ devices include:
• EFR32xG21-C
• EFR32xG21-D
• EFR32MR21-C
The EFR32xG21-C+ device was designed to be both pin- and hardware-compatible, as well as largely code-compatible, with
EFR32xG21-B devices, thus requiring only minor changes when porting designs. Refer to the device-specific data sheets for perform-
ace metrics that may differ between the EFR32xG21-B and EFR32xG21-C+.
AN1377: EFR32xG21 Revision B to Revision C+ Compatibility and Migration Guide
Introduction
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