[shaklee3]

You're confusing bit ordering and endianess. There are many microcontrollers that will change the bit ordering on i2c and spi buses to accommodate various devices, but that's not endianess.

[tropo]

Bit ordering and byte ordering are both endianness. Word ordering is also endianness, as is nibble ordering. It's all endianness.

The fact that we typically refer to byte ordering doesn't mean the others are not also endianness.