This special instruction has INSN_INTTRIG as the insn member in its instruction data structure. Its execution causes an internal triggering event. This event can, for example, cause the device driver to start a conversion, or to stop an ongoing acquisition. The exact meaning of the triggering depends on the card and its particular driver.

The data[0] element of the INSN_INTTRIG instruction is reserved for future use, and should be set to 0.