Protected types were introduced in VHDL-2002 to allow the creation of class-like objects (similar to classes in C++), which then later became required for shared variables in VHDL-2008. In VHDL-2019, ...

This paper presents NoC router architecture which has low latency and requires less area. The design is implemented in VHDL and simulated in Xilinx ISE design suite 13.1.