Title of the experiment: Write a VHDL code for JK flip flop and simulate using software or implement it in FPGA kit.
Introduction:
To develop the code for JK flipflop and simulate using software or implement it in FPGA kit.
Material required:
1. Xilinx Software Loaded PC = 1 Set.
2. Printer = 1.
3. FPGA kit Interface cable = 1.
4. 9V DC Adopter = 1.
Description:
1. Theory
2. Algorithm
3. Description
4. VHDL Code Writing
5. Compile and Run program.
ALGORITHM:
1. Define Library functions.
2. Declare Entity and Architecture.
3. Describe functionality.
4. End source code.
5. Compile and Run program.
Description
A JK flip-flop is a refinement of the SR flip-flop in that the indeterminate state of the SR type is defined in the JK type.
THEORY:
Inputs J and K behave like inputs S and R to set and clear the flip-flop (note that in a JK flip-flop, the letter J is for set and the letter K is for clear)
JK Flip Flop Circuit:
JK Flipflop truth table:
VHDL Code for JK Flip Flop:
library IEEE; use IEEE.STD_LOGIC_1164.ALL; use IEEE.STD_LOGIC_ARITH.ALL; use IEEE.STD_LOGIC_UNSIGNED.ALL; entity JKFF is port( j: in std_logic; k: in std_logic; clk: in std_logic; rst: in std_logic; q: out std_logic; qb: out std_logic); end JKFF; architecture behavioral of JKFF is begin process(j,k,clk,rst) begin if(rst='1') then q <= '0'; qb <= '0'; elsif (rising_edge(clk)) then if(j/=k) then q <= j; qb <= not j; elsif(j='1' and k='1') then q <= not j; qb <= j; end if; end if; end process; end behavioral;
Result:
Inputs J and K behave like inputs S and R to set and clear the flip-flop (note that in a JK flip-flop, the letter J is for set and the letter K is for clear)
Questions with answers:
1. What is JK JJ?
A JK flip-flop is a sequential bi-state single-bit memory device named after its inventor by Jack Kil.
2. Use of JK JJ?
Ans: The JK Flip-flop is similar to the SR Flip-flop but there is no change in state when the J and K inputs are both LOW.
3.Type of Flip Flop?
Four types namely D-Flip Flop, T- Flip Flop, SR- Flip Flop and JK- Flip Flop.
Video Tutorial:
