Keil Logo

Folder Structure

The installation program copies the development tool into sub-folders of the root folder.

Root Folder Toolchain
C:\Keil_v5 C166, C51, C251 Development Tools

Throughout our documentation, we refer to the root folder with root. You can install your toolchain instance in another folder. Then, adjust the paths accordingly.

The installation can vary depending on the installed products or add-ons.

Generic µVision Files

Folder Contents
..\UV4 Generic µVision files.

C166 Development Tools (for C16x / XE16x / XC20x)

Folder Contents
..\C166\AR166 Advanced RTX166 Real-Time Operation System (if installed).
..\C166\asm Include files for the Macro Assembler.
..\C166\bin Executable files of the C166 toolchain.
..\C166\Boards Board specific example programs.
..\C166\Examples Generic Example programs.
..\C166\Flash Flash programming algorithm files for the Keil ULINK USB-JTAG adapter.
..\C166\hlp Online documentation for C166 toolchain.
..\C166\inc Include files for the C and EC++ compiler.
..\C166\lib Run-time libraries and CPU startup files.
..\C166\Monitor Monitor-166 configuration files and pre-configured Monitor Versions.
..\C166\OCDS Interface files on-chip debugging system (OCDS) and Keil ULINK.
..\C166\Rtx_Tiny RTX166 Tiny Real-Time Operation System.
..\C166\SFD System View Description files.
..\C166\ULINK ULINK2 USB Driver and Configuration utility.

C51 Development Tools (for classic and extended 8051 variants)

Folder Contents
..\C51\ASM Assembler Source Template and Include files for the Macro Assembler.
..\C51\BIN Executable files of the C51 toolchain.
..\C51\Examples Example programs.
..\C51\FlashMon Configuration files for Flash Monitor and pre-configured versions.
..\C51\Hlp Online documentation for C51 toolchain.
..\C51\INC Include files for the C compiler.
..\C51\ISD51 Files for ISD51 In-System Debugger and pre-configured versions.
..\C51\LIB Run-time libraries and CPU startup files.
..\C51\MON51 Configuration files for Monitor-51 (for classic 8051 devices).
..\C51\MON390 Configuration files for Monitor-390 (for Dallas Contiguous Mode) .
..\C51\RtxTiny2 RTX51 Tiny Version 2 Real-Time Operation System.
..\C51\ULINK ULINK2 USB Driver and Configuration utility.

C251 Development Tools

Folder Contents
..\C251\ASM Include files for the Macro Assembler.
..\C251\BIN Executable files of the C251 toolchain.
..\C251\Examples Example programs.
..\C251\HLP Online documentation for C251 toolchain.
..\C251\INC Include files for the C compiler.
..\C251\LIB Run-time libraries and CPU startup files.
..\C251\MON251 Configuration files for Monitor-251.
  Arm logo
Important information

This site uses cookies to store information on your computer. By continuing to use our site, you consent to our cookies.

Change Settings

Privacy Policy Update

Arm’s Privacy Policy has been updated. By continuing to use our site, you consent to Arm’s Privacy Policy. Please review our Privacy Policy to learn more about our collection, use and transfers
of your data.