Toggle-FF

T=J=K

↑ = rising edge of clock

• Q(t+1)=[(Q' and T) or (Q and T')](t) = Q(t) xor T(t)

simple structure - but problems by application because of real runtimes!!!!

JK-FF with Reset:

U_D_MS: D_MS
     port map (CLK, D, Q, Qn);
 
  D <= '0' when RESET = '1' 
           else (Qn and J) or (Q and not K);