17. Extract the Nibble from an 8-bit Register

Hello Rohit, 

Nibble is a group of 4 bits. Since each bit can be 0 or 1, a nibble can represent 16 values (from 0000 to 1111 in binary), which is equal to 0 to 15 in decimal or 0 to F in hexadecimal.

Example :

Decimal  is 25, then the binary of 25 is 00011001 then the nibbles are as follows
Nibbles : High = 0001 (1), Low = 1001 (9)