A process in a behavioural design style contains a list of s

A process in a behavioural design style contains a list of signals. Name this list and briefly explain its use. What type of statements are used within a process? The entity declaration of the logic diagram shown in Fig 3(d)(1) is given in Fig. 3(d)(2). Write three different VHDL codes to describe the architecture body using: A structural design style. A behavioural design style. A dataflow design style.

Solution

c) the sensitive signals which make changes in system will used with in process

d)

(iiI)

architecture dataflow of xor3 is

signal xor1_out,xor2_out:std_logic;

begin

xor1_out<= A xor B;

xor2_out<=xor1_out xor C;

xor3_out<=xor2_out xor D;

end dataflowl;

(ii)

architecture Behavioral of xor3 is

signal xor1_out,xor2_out:std_logic;

begin

process(A,B,C,D);

begin

xor1_out<= A xor B;

xor2_out<=xor1_out xor C;

xor3_out<=xor2_out xor D;

end process;

end Behavioral;

(i)

architecture structural of xor3 is

signal :xor1_out,xor2_out:std_logic;

begin

x1:xor_gate(A,B,xor1_out);

x2:xor_gate(A,xor1_out,xor2_out);

x3:xor_gate(A,xor2_out,xor3_out);

end structural