What's the difference between always @ (posedge clk) and @ (posedge clk)?

[spartanthewarrior]

Hi,

Can anybody tell me that What is the difference between

always @ (posedge clk)

and

@ (posedge clk)

 

[Arik]

Re: Always Block

the difference is that when you write @(posedge clk) it's just a conditional statement, which checks for clocks positive edge. And always @(posedge clk) is continous by its nature and is usually used for modelling of synchronous logic like flip-flops.

 

[phutanesv]

Re: Always Block

Hai dude,

always@ (pos edge)

This is like saying at all pos egde do the job always.

no condition to contiune with pos edge only.

@pos edge

this is saying like do the job inly at pos edge.

conditioning

 

[rajsrikanth]

Re: Always Block

always @(posedge clk) means at every positive edge of the clock the code inside the always block will be executed.

 

[darylz]

Always Block

the difference is the "always"

"@ (posedge clk) " is checked somtimes, if "always" is put ahead, it's "always" checked during simulation

 

[anildesh]

Re: Always Block

when you use always it means that all posedges of the clock this should happen. @() is just a conditional statement when you synthesize it may be then u will find the difference

 

[anilkumarv]

Re: Always Block

The first one ,i.e.
always@(posedge clk)
The block under this executes at every postive edge of the clock

@posedge clk
This means that the block under this executes only once and that too, only at the first posedge of the clock