The LCDS instruction is used to load data from the UPDI and ASI
CS-space. LCDS is based on direct addressing, where the address is part
of the instruction opcode. The total address space for LCDS is 16 bytes
and can only access the internal UPDI register space. This instruction only supports
byte access and the data size is not configurable.
Figure 1. 
LCDS Instruction
Operation
The figure above shows a typical example of LCDS data
transmission. A data byte from the LCDS space is transmitted from the
UPDI after the Guard Time is completed.