# D and T flip flop

#### CSharpque

Joined Sep 23, 2011
40
hello
Can any one tell me the logic diagram and truth table of D and T flip flop using NAND to NAND or NOR to NOR gate?

#### Georacer

Joined Nov 25, 2009
5,182

#### CSharpque

Joined Sep 23, 2011
40
Actually i want to develop a program for flip flop in C language. For that i want logic diagram (Circuit) an truth table for T and D flip flop. I have already seen lot of articles and sites for these but all say different diagram and truth table. So i confused which can be used and how i implement it in C language? I have already implement SR flip flop but confuse in these two.
Help me its urgent

#### CSharpque

Joined Sep 23, 2011
40
any one help me for my question?

#### shortbus

Joined Sep 30, 2009
8,591

#### CSharpque

Joined Sep 23, 2011
40
i have already search in Google and also read a book but no one says what are input and how it works? There is some previous state and next state value to be input.But how i don't understand.
ANyone help me!

#### lupinkr

Joined May 17, 2011
9
Well if it is a truth table you want, the link georacer gave has one ! Look :

Rich (BB code):
Truth table:
Truth table:
Clock	        D	Q	Qprev
Rising edge	0	0	X
Rising edge	1	1	X
Non-Rising	X	Qprev
The input is D, the output if Q. If the clock is on Rising edge, and the input is low, then Q will be 0 regarless of what was the value of Q before. If the input is high, then Q will be 1 regardless of Qprev. But in the case of Non-rising, then whatever input you put, Q will remain the same as it was before.