34.3.3.6 STCS (Store Data to Control and Status Register Space)
The STCS
instruction is used to store data to the UPDI and ASI
CS-space. STCS is based on direct addressing, where the address is part of the
instruction opcode. The total address space for STCS is 16 bytes, and can only access
the internal UPDI register space. This instruction only supports byte access, and data
size is not configurable.
Figure 34-14 shows the data frame transmitted after the SYNCH and
instruction frames. There is no response generated from the STCS
instruction, as is the case for ST and STS.