Keil Logo

SSKDEF Assembler Statement

SSKDEF number

The SSKDEF statement specifies a number (0-7) that sets the size of the system stack. Only one SSKDEF statement may appear in a program.

number System Stack Size Address Range
0 256 Words 0FA00h-0FBFFh
1 128 Words 0FB00h-0FBFFh
2 64 Words 0FB80h-0FBFFh
3 32 Words 0FBC0h-0FBFFh
4 512 Words 0F800h-0FBFFh
5 Reserved Do Not Use
6 Reserved Do Not Use
7 Unlimited  


  • The number specified with the SSKDEF statement is an index into a pre-defined table of stack sizes. It is not the actual size of the system stack.
  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.