[Moved] 9-bit shift register Vs 3-bit counter. Which one has larger area?

[alexpanrui]

As mentioned in the title, which one has a larger area?

What I am intended to do is to use shift register as a counter. E.g. If I want to count 8 times of certain operation, a 9-bit shift register is used to shift a binary '1' from index 0 to index 8. The operation stops when '1' reaches index 8. I can also do it with a 3-bit counter. I am just wondering which implementation is more area effective. Thank you.

 

[KlausST]

Hi,

I´d say a 3 bit binary counter is more effective.

What device and software do you use?

Klaus

 

[TrickyDicky]

Why not build them both and find out?
Different chips have different resources, so results will differ across devices.
Shift register will be 9 registers and no logic. Counter will be 3 registers and some logic.

 

[alexpanrui]

Hi,

I´d say a 3 bit binary counter is more effective.

What device and software do you use?

Klaus

Hi, Klaus,

Thank you for your replay. I am currently doing implementation with altera DE0-nano in Quartus II.

 

[alexpanrui]

Why not build them both and find out?
Different chips have different resources, so results will differ across devices.
Shift register will be 9 registers and no logic. Counter will be 3 registers and some logic.

Great idea.