There are two ways that byte addresses can be assigned across words. Big Endean and little Endean
Big Endean:
- When lower byte addresses are used for more significant bytes (left most ) and upper byte addresses are used for less significant (right most) bytes
Little Endean:
- When lower byte addresses are used for less significant bytes (right most ) and upper byte addresses are used for more significant (left most) bytes
Less and more refers to the weightage of the bits. As right most bits have lesser weightage compared to the weightage of left most bits
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