KR-XATiny is an RTOS for the XA family and offers a variety of services, providing time and memory management, semaphores, synchronizing events, inter-task communications, and more sophisticated functions such as a perpetual calendar.
KR-XATiny is limited in the number of tasks according to the software used:
- EVALXA (demonstration version): 3 tasks
- Lite Suite RKitLXA: 8 tasks
- Professional Kit RKitPXA: 8 tasks.

Task declaration is done at the 'C'-source level, while configuration of the kernel is made at the project level. The SIMICE-XA simulator provides a variety of information on the status of the Kernel and each task.

The KR-XATiny executive is a real time kernel for the XA microcontroller family. Placed in the heart of an application, it provides efficient task scheduling by driving :

• task activation : initiate, waiting or stop.

• task relationships.

KR-XATiny is easy to implement and permits the programmer to concentrate on each task, independently from the remaining application. KR-XATiny recognizes tasks written in either assembly or 'C', (MA-XA and RC-XA respectively).

KR-XA consists of two parts :

• the scheduler which is the task scheduling program.

• the services or functions that can be called by tasks to send various requests to the scheduler.

KR-XA is fully integrated in the Enterprise Kit RKitEXA version of the software.

It has the same features as KR-XATiny but with up to 125 tasks instead of just 3 or 8.