This instruction results in 1 byte of data from U(0) being sent to the peripheral. There are 16 allowable command codes, so this instruction could address 16 1-byte registers, for example in a 16-digit display, or represent 16 different commands with 1-byte arguments.

The peripheral will respond with a True or a False. This will be saved in U(0).

This is a low-level instruction associated with the SPLat Expansion Framework. You will most likely never need to know how to use it.

See also Error handling in SPx transfer instructions