address width in RAM

[kawakami]

Why the "address" array width in RAMn is log2(n)?

[WBahn]

How many words can an address that is b-bits wide address?

[kawakami]

Thank you for very quick reply!

Finally, I understand why. 8 registers can be expressed 2^3. So width is 3.
Very simple.

As I'm a programmer, I miss-understood the width of array.
Thanks!