OSCI TLM 2.0 offers a standard approach to building Transaction Level Models.

At the simplest level a TLM is a set of SystemC modules (i.e. C++ classes), each providing one or more sockets through which the SystemC modules may read and write data.

The behavior of each module is provided by a number of parallel threads (functions of the C++ class), which communicate with the threads in other modules by passing data (i.e. reading or writing) through the sockets. This communication is known as a transaction and the data passed as a payload. Figure 2.1 shows the key components in a TLM 2.0 model.

Figure 2.1.  Key components in an OSCI TLM 2.0 model.