Actually, Bit depth will affect file size. For example:

1-bit=2kb 4-bit=21kb 24-bit=24kb

Each 0 or 1 is called a bit-short for binary digit.

just a note: Clarify your question

Bit-addressable registers are registers that its bits can be modified individually. that means if you have register named "ACC" that is bit addressable , you can change its bits (D0 -D7) individually by special instructions SETB and CLR.

ex: SETB ACC.3 ; will set bit number 4 (remember bit 0) in the register

in 8051 there are many bit-addressable registers such as A (ACC), B, SCON, PCON, TCON, p0,p1,p2,p3 .

best wishes,

drdigital.

Ait

A bit is a contraction of "Binary Digit". It represents a single datum, which may have a value of zero ("off") or one ("on").