- (), ȗ, . 8.28, .
VT1 VT2 U0 , VT2 VT4 , U0. U1, (VT1 VT2), (VT3 VT4) . U0.
ȗ (. 8.28, ) U0 , VT1 VT2, , VT3 VT4 , . , U0 , . U1 VT1 VT2 , VT3 VT4 , U0.
ȗ ȗ .
, , . ( ) , (byte). 256 . . 8.29, , , 3- , 8 . . 8.1. , , . . 8.29, .
8.1.
Y1 | Y2 | Y3 | |
X0 | |||
X1 | |||
X2 | |||
X3 | |||
X4 | |||
X5 | |||
X6 | |||
X7 |
, , , . . 8.30, , . 8.30, . , 101, 5. , . , , . , .
|
|
. . : 0 + 0 = 0,0 + 1 = 1,1 + 0 = 1,1 + 1=0. 10. .
, , (. 8.31, ). . 8.2.
8.2.
Xi | Yi | a | b | c | d | Si | Pi+1 |
Si = 1 , . i+1 , . . 8.31, .
, . (. 8.32, ).
. 8.32, 6. . 8.3.
8.3.
Pi | xi | Yi | Si | Pi+1 |
. :
0 0 1 (1) | 0 0 1 (1) | 0 1 0 (2) | ||
+ | + | + | ||
0 1 0 (2) | 0 1 1 (3) | 0 1 1 (3) | ||
------------------------------------ | --------------------------------------------------- | -------------------------------------------- | ||
0 1 1 (3) | 1 0 0 (4) | 1 0 1 (5) |
8- 16- .
. . (. 8.33, ), (. 8.33, ).
Q , . : Q =0, = 1, Q = 1, =0. () , (), (trigger ). .
|
|
RS-
RS- ȗ ȗ. . 8.34, , . 8.34, , . 8.34, RS-, ȗ. R Q , . R reset . S Q , . S set . , R S, RS-. RS- ȗ . t1, Q ( ). t2 , , S ( t3), Q . ( t4) .
R S . , . S=R=1 .
RS- ȗ (. 8.35, ) (. 8.35, ), .
RST-
RST- RS- , ( clock ) .
. 8.36, RST-, . 8.36, , . 8.36, . - R- S -.
D-
D- . delay . D. , D, Q t3, . D- . 8.37, , D- . 8.37, , . 8.37, . 4 (DD1...DD4), RST-, (DD5).