ks</li>
<li>SVC (Supervisor Call) when calling the majority of RTX functions from <b>Thread</b> mode</li>
<li>PendSV (request for system-level service) when calling certain RTX functions from <b>Handler</b> mode</li>
</ul>
<p>Interrupts can be used without limitation. Interrupt priority grouping can be used with some restrictions:</p>
<ul>
<li>IRQ interrupts are never disabled by RTX Kernel for Armv7-M architectures (Cortex-M3/M4/M7).</li>
<li>Software interrupt 0 is used by RTX and cannot be used in an app