Is Spi Msb or Lsb?

The SPI protocol does not specify whether the most-significant bit (MSb) or least-significant bit (LSb) is transmitted or received first during an SPI transfer. Hence, most SPI devices allow this bit order to be configured.

How do I know if I have MSB or LSB?

In a binary number, the bit furthest to the left is called the most significant bit (msb) and the bit furthest to the right is called the least significant bit (lsb).

What is the byte order of SPI protocol?

The data on the SPI bus is clocked with most significant bit first. All multi-byte register data are sent in big-endian byte order.