Sách điện số/Bộ phận điện số/Bộ ghi nhận điện số

SR Register

sửa
 
Enable S R Q Q
0 0 0 Latch
0 0 1 Latch
0 1 0 Latch
0 1 1 Latch
1 0 0 Latch
1 0 1 0 1
1 1 0 1 0
1 1 1 Metastable


D register

sửa
 
Enable D Q Q
0 0 Latch
0 1 Latch
1 0 0 1
1 1 1 0
 

and can be described either of the following tables:

T register

sửa
 
A circuit symbol for a T-type flip-flop: T is the toggle input and Q is the stored data output.
Characteristic table
T Q Qnext Comment
0 0 0 Hold state
0 1 1
1 0 1 Toggle
1 1 0
Excitation table
Q Qnext T
0 0 0
0 1 1
1 0 1
1 1 0

JK register

sửa
 
Symbol for a JK flip-flop
Characteristic table
J K Qnext Comment
0 0 Qprev Hold state
0 1 0 Reset
1 0 1 Set
1 1 Qprev Toggle

|

Excitation table
Q Qnext J K Comment
0 0 0 X Hold state
0 1 1 X Set
1 0 X 1 Reset
1 1 X 0 Hold state