Entity declaration procedure

This behavioural description requires the buffers contained within the BUFFERS block to enable and disable the input and output ports connecting die random sequence generator to die external bus. The code demonstrates another way of declaring and defining a procedure - bodi the procedure declaration and body are contained within the entity declarative part. 

Manufacturer is the entity responsible for designing and manufacturing a product that is covered by a directive or directives with a view to placing it on the market. The manufacturer shall follow the appropriate assessment procedures and is responsible for all aspects of the product s conformity. This includes, but is not limited to, the product s design, testing, reports, documentation, declaration, technical file, and CE marking. The manufacturer is ultimately liable for the product s... 

One of the key features of this code is its modularity. The bit width of die sequence generator is only specified in the port declaration statement of the entity. In this case, it is 4 bits wide, but it could have been any value from 3 upwards. This lower limit is set by the procedure RND GEN and will be explained shortly. 

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