HI!

I am studying for exam and i don't know what is "NAND WIRED" and why is it used? What are advantages and disadvantages of using NAND-WIRED instead of NAND?

Another thing that I don't understand is what are Registers and why are they used? What is the difference between register and Memory (like RAM)?

thank you and sorry for my bad english!

 

I'm not familiar with wired nand, but a wired AND is built from open collector outputs. It allows you to have multiple outputs tied together to a common source.

Unless you're speaking of something different, registers are basically the same as memory. They're usually designated to specific task.

 

A collector is one of the pins on a transistor that makes up the NAND gates in the picture. Normally they're tied internally to power in the chip itself. with open collector outputs, you need to tie the outputs to power.

 

http://www.allaboutcircuits.com/vol_4/chpt_3/5.html Check this out.

 

Thanks! I understand now!
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