8 bits = 255

1 - 1 - 1 - 1 - 1 - 1 - 1 - 1

0000 = 0

0001 = 1

0010 = 2

0011 = 3

0100 = 4

0101 = 5

The advantage of parallel communication is it sends the data same time.

The cons of parallel communication is, it requires many pins for things such as sounds, image etc.

In sensor

SDA = Data

SCL = Clock