silabs.com | Building a more connected world. Silicon Labs 8051 SDK 4.2.1.0
8-Bit MCU SDK 4.2.1.0 GA
21Q2 8051 SDK
June, 2021
The 8051 SDK provides infrastructure support for applications developed on 8-bit
devices, and it provides interfaces with the underlying hardware. It is composed of
the following modules:
• 8-Bit Device Header Files
• 8-Bit Peripheral Driver Libraries
• Sample Applications/Examples for 8-Bit Development Kits
This document covers the following SDK version:
8051 SDK 4.2.1.0 released June, 2021
Compatibility and Use Notices
If you are new to the Silicon Labs 8-bit SDK, see Using This Release.
Compatible Compilers:
• Keil v9.60
KEY FEATURES
• Updated EFM8BB51 and EFM8BB52 header
files for Rev C
• Added peripheral driver libraries for
EFM8BB51 and EFM8BB52
• Added demos and examples for EFM8BB51
and EFM8BB52
Contents
silabs.com | Building a more connected world. Silicon Labs 8051 SDK 4.2.1.0
Contents
1 New Items .......................................................................................................................................................................................... 2
1.1 New Device Headers .................................................................................................................................................................. 2
1.2 New Peripheral Driver Libraries .................................................................................................................................................. 2
1.3 New Sample Applications ........................................................................................................................................................... 2
2 Improvements ..................................................................................................................................................................................... 3
2.1 Updated Device Headers ........................................................................................................................................................... 3
2.2 Updated Peripheral Driver Libraries ........................................................................................................................................... 3
2.3 Updated Sample Applications..................................................................................................................................................... 3
3 Fixed Issues ....................................................................................................................................................................................... 4
4 Known Issues in the Current Release ................................................................................................................................................ 5
5 Deprecated Items ............................................................................................................................................................................... 6
6 Removed Items .................................................................................................................................................................................. 7
7 Using This Release ............................................................................................................................................................................ 8
7.1 Installation and Use .................................................................................................................................................................... 8
7.2 Support ....................................................................................................................................................................................... 8
8 Legal................................................................................................................................................................................................... 9
8.1 Disclaimer ................................................................................................................................................................................... 9
8.2 Trademark Information ............................................................................................................................................................... 9