
VHDL—RTL Design, Combinational Logic, Data Types, and Operators 15.5
3. Give examples of identical basic identifiers.
4. Give examples of extended identifiers.
5. Give examples of distinct extended identifiers.
6. Give examples of keywords.
7. Give examples of distinct extended identifier and keyword.
8. Give examples of how to describe comments in the codes.
Solution
1. Examples of permitted basic identifiers in VHDL are Z, A, Y1, muxSignal,
mux2logic, LogicCircuit_C.
2. Examples of not permitted identifiers in VHDL are _Z, 1Y, mux3_,
Logic_Circuit_C.
3. muxsignal, MUXSIGNAL, muxSignAl, and MuxsignaL, are con-
sidered as identical identifiers. ...