, , : , , . . , . . . .
. 12.5.
. 12.5 :
, () ; V ; () ; S ' R ' ;
S R ; Q Q
, , V, , S, R (), () (). , , : (), () (). , .
. 12.1. : RS- , D -, JK - .
( . , , ). () , . , , () . , .
, , , . . .
. 12.1.
, , . , , , .
, (. 12.6): , . , (), . 12.1. - , (. 12.6, ). .
|
|
. 12.6.
, 0 1, (. 12.6, ), , 1 0, (. 12.6, ).
, . , , . , , (. 12.6, ).
12.4. RS -
RS - .
RS - .
RS - . RS - (. 12.7, ) R S, : Sn = Rn = 0; Sn = 1, Rn = 0; Sn = 0; Rn = 1 Sn = Rn = 1.
. 12.7. () () RS -
Q Q, , (. 12.2). :
. 12.2. RS -
tn tn+1 ; Sn Rn tn; Q n Q n+l tn tn+1. Sn = Rn = 0 . , tn Q n = 1, Q n = 0, tn , Q 1(Q n +1 = 1). 1, S 0, Q 0 (Q n +1 = 1). , , Q n = 0 Qn=l, . Sn = Rn = 0 .
Sn = 1, Rn = 0 RS - : Q n+1 = l, Q n+1 = 0, (Q n = 0, Q n = l). RS - tn ( Q n = 1, Q n = 0), (Q n+1 = 1, Q n+1 =0). S : 1 1 .
|
|
Sn = 0, Rn = 1 . , Q n = 1 Q n = 0, Sn = 0 Rn = 1 1. 0 (Q n+1 = 0), , Q n+1 . (Q n = 0, Q n = l), Sn = 0, Rn = 1 , , , Q n+1 = 0, Q n+1 = 1. R .
Sn = Rn = 1 (Q n+1 = 0, Q n+1 = 0). (Sn = Rn = 0), . Sn = Rn = 1 RS - x.
. , . 12.7, .
RS - . RS - (. 12.8, ).
RS - 0. (RS -). RS - , (. 12.8, ). . 12.3.
. 12.8. () () RS -
RS - , Sn = Rn = 1 , a Sn = Rn = 0 .
. 12.3. RS -
RS - (. 12.8, ), RS -, . RS - () (, 1551).
RS - . RS - , , . . 12.9, RS - . DD3 DD4, DD1 DD2 . S R, , , , S R . S R = 1.
q 1 q 2. , . 12.8, . DD1 DD2 S R,
. 12.9. () (; )
RS-
q 1 q 2 S R.
RS -, Q n = 0, Sn= 1, Rn = 0. = 0, DD1 DD2 q1=q2= 1. q 1 q 2 , Q n = 0. S R. ( = = 1) DD1 1, q1 = 0 Q n+1 = 1. q2 = 1 ( Rn = 0 = 1), DD4 q2 = 1 Q n+1 = 1 Q n+1 = 0. , , , = 0 q1 = q2 = 1.
|
|
Q = 0 Sn = 0 Rn = 1. Sn = Rn = 1 , =1 q1 = q2 = 0, : Q n+1 = Q n+1 = 1.
RS - . 12.9, , . 12.4.
DD3 DD4 ( . 12.9, ) S R, 0 1, . , (. . 12.3). , , . 12.9, .
. 12.4. RS -
S = R = 1.
RS - . RS - (. 12.10). Sn = 0 Rn = 0
. 12.10. () () RS-
= 0 . 12.3. Sn = Rn = 0 n = 0. , DD1 DD2 1 (Sn = l, n = 1, Rn = 1) q1 = q2 = 0. DD3 DD4 1.
RS - , . , .
RS - . RS - (. 12.11, ). , , , . 12.11. .
. 12.11. () () RS -
RS - . , . , : (S -), (R -), (E -) (JK -).
|
|
12.5. D -
D - D . D-. D - (. 12.12, ) DD3 DD4 RS - . DD1 DD2 .
( = 0 ) DD1 DD2 , q1 = q2 = 1 Q n = 1 Q n = 0. D
. 12.12. () () D -
DD1 DD2 .
= 1, D , . . Dn = 0, DD1 q1 = 1. DD2 1 ( = 1, q1 = 1), (q2 = 0), DD4 DD3. (Q n +1 = 0, Q n +1= 1). = 1 D 1 (D = 1), DD1, 0 (q 1= 0), DD2 q2 = 1. q 1= 0 DD3 (Q n +1 = 1), DD4 , q2 = 1 Q n +1 = l.
, Q D - , D . () , q1 = q2 = 1. , D - , , D. D - ( . delay , ).
D - . .
, DV -, D - V ( . valve , ), . 12.13, . V = 1, D -. V = 0 DD1 DD2 D ,
. 12..13. (), () DV - ()
, .
. 12.13, 2 . 1 2 2 D. 2 D ( ) 1, Q = 1 T 1 = 1 (T 1=0). T1 1 ( T 1=0).
D - DV- , .
12.6. JK -
JK - RS -, , . J S, K R. Jn = Kn = 1, Sn = Rn = 1 RS -, JK - .
JK - . JK - . 12.14, . DD5 DD6 ,
. 12.14. () () JK -
RS- . DD1 DD2 , a DD3 DD4 , . JK- , J K, Q Q.
Jn = Kn = 0, Q n Q n DD1 DD2 q1 = q2 = 1, . Jn = 1 Kn = 0- q2= 1, q 1 . Q n = 1 Q n = 0, DD1 Jn =1, Q n = 0 q1 = q3= 1. . Q n = 0, a Q n = 1, q1 = q3 = 0, DD5 Q n +l = 1, DD6 Q n+1 = 0. Kn = 1 Jn = 0 , , .
|
|
Jn = Kn = 1 Q n = l, a Q n = 0. q2 = q4 = 0, DD6 Q n+1 = l DD5 Q n+1 = 0. Jn = Kn = 1 Q n = 0, Q n = l q1 = = q3 = 0, DD5 Q n+1 = 1, DD6 Q n+1 = 0. , , JK - Jn = Kn = 1 .
DD3 DD4 DD1 DD2. Q n+1 Q n+1 DD1 DD2 Jn Kn, . . Jn+1 = Kn+1 = 0. . J K , DD1 DD2 . , JK - , (. 12.14, ).
JK - (. 12.5).
. 12.5. JK -
JK - - . JK - , MS ( . master-slave, -).
JK - . JK - (. 12.15, ) RS- T1 2 , 2 . =1. ( = 0) .
. 12.15. () (, ) JK -
, . JK - / J K -.
JK - S R J, K . JK - (. 12.15, ).
K JK - (. 12.16), JK - D -. , D = 0 = 0, J = = 0, K =1. = 1 JK - Q = 0, Q= 1.
. 12.16. D -, JK -
D = 1 (J = 1, K = 0), JK - Q = 1, Q = 0.
12.7. T -
T - ( . toggle ) ( ). - .
T - 12.2 (. 12.3). T - , RS-, J- D -.
. 12.17, RS - T -. ,
. 12.17. () (, ) T -,
RS -
. 12.18. T -,
JK- (, ) D - ()
Sn = Q n = 1 ( Rn = Q n = 0), = 1 . . Q n+1 = 1, Q n+1 = 0. Rn+1 = Q n+1 = 1 , : Q n+2 = 0, Q n+2 = 1.
. 12.18 JK - () () T -, D - T -.
TV -, V (. 12.19, ). V = 1 T -, V = 0 .
. 12.19. TV -
. 12.19, TV - JK -.
- TV - .
1. - (. 12.1) VT1 VT2.
2. - () (. 12.3).
3. RS - . ?
4. RS - (. 12.9, ). R S ?
5. S = R = = 0 RS - (. 12.10) ?
6. D - .
7. DV - D -?
8., JK -, .12.14, .
9. , . 12.17, ?
13.