  The integrated low-level trigger and data acquisition (TDAQ) system of the
NA62 experiment at CERN is described. The requirements of a large and fast data
reduction in a high-rate environment for a medium-scale, distributed ensemble
of many different sub-detectors led to the concept of a fully digital
integrated system with good scaling capabilities. The NA62 TDAQ system is
rather unique in allowing full flexibility on this scale, allowing in principle
any information available from the detector to be used for triggering. The
design concept, implementation and performances from the first years of running
are illustrated.
