8-bit Microcontroller Studio

Silicon Labs offers an advanced 8-bit microcontroller studio, available at no charge to developers. These tools unlock the power and flexibility of the 8-bit microcontroller family.

All C8051Fxxx families are supported by the 8-bit Studio. If your 8051 device does not appear in the list below, you can also use Simplicity Studio Software Suite.


The following devices are supported by Microcontroller Studio:



















These tools help develop, download, and debug firmware to the 8051/EFM8 8-bit MCU devices. Now includes an unlimited Keil® PK51 Professional Developer's Kit! Register your product and receive the key to unlock your PK51 tools.

Silicon Labs IDE

The Silicon Labs Integrated Development Environment (IDE) is a complete, stand-alone software program that includes a project manager, source editor, source-level debugger and other utilities. The IDE interfaces to third party development toolchains to provide system designers with a complete embedded software development environment. The IDE supports the entire 8-bit microcontroller (MCU) portfolio.

IAR Embedded Workbench

IAR Embedded Workbench for 8051 is a complete IDE with many smart features, including a highly optimizing compiler, a comprehensive debugger, integrated static analysis tools, and more. This workbench supports all EFM8 devices.   

Configuration Wizard

The Configuration Wizard 2 utility helps accelerate development by automatically generating initialization source code to configure and enable the on-chip resources needed by most design projects. In just a few steps, the wizard creates complete startup code for a specific Silicon Labs MCU.

Flash Programming Utilities

The Flash Programming Utilities allow you to download your code to a device and perform other memory operations without needing to use the Silicon Labs IDE. These utilities are static examples of the C8051Fxxx On-Chip Interface Utilities DLL detailed in application note AN117. The downloaded installation utility installs both the Windows Flash Programming Utility and the Command-line (32-bit) Flash Programming Utility.

Keil® PK51 Developer’s Kit

The Keil PK51 Developer’s Kit includes an industry-leading 8051 C compiler, linker and assembler for use wih Silicon Labs’ 8-bit microcontrollers and Studio. This toolchain package provides the build support for 8051 projects, while the IDE provides editing and debugging support. This free toolchain comes without a time or code size limit!

ToolStick Development Tools

The Silicon Labs ToolStick is an easy to use development system that allows designers to develop and debug application firmware directly on the target microcontroller using the Silicon Labs Integrated Development Environment (IDE). Once complete, designers can replace the Daughter Card with a Programming Adapter and program blank devices for use in their actual system.

Debug Driver for Keil µVision Software

Silicon Labs and Keil Software have teamed to provide support for the C8051F family of MCUs in the Keil µVision state-of-the-art development platforms. The µVision debug driver allows the Keil µVision IDE to communicate with Silicon Labs on-chip debug logic. In-system Flash memory programming integrated into the driver allows you to rapidly update target code. The µVision IDE can be used to start and stop program execution, set breakpoints, check variables, inspect and modify memory contents and single-step through programs running on your actual target hardware.

Additional Components

The following additional components are also included, which support all 8-bit Silicon Labs MCU devices:

Additional Software 

Product Description
IEC-60730 Safety Libraries Software libraries that comply with IEC safety standard 60730 Class B for EFM8 devices.

Additional USB Software

The following USB software and drivers are available as additional software downloads.

Product Description
USB Direct Access Drivers USBXpress Drivers, Firmware and Host API for CP210x and USB microcontroller products
CP210x VCP Drivers Drivers for Windows and Mac
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