78 EMBEDDED SYSTEMS
to be designed to be deterministic. Processors used for ‘real-time’ applications usually
have a ‘tightly coupled memory’ which gives deterministic performance in contrast to
the probabilistic performance of caches.
2.3.5.3 | Tightly Coupled Memory
is is just a fast memory directly connected to the processor core (inside the chip). It is
meant to provide low-latency memory that the processor can use without the unpredict-
ability associated with caches. Actually, it is an area of memory in which important and
critical items like interrupt handlers, real-time task codes, etc., are stored. It can also hold
important data which is needed frequently. Many ARM processors which are designated
to be specifi c for real-time applications ...