The LDCS instruction is used to load serial readout data from the
UPDI Control and the Status register space located in the DL layer into the PHY layer
shift register. The LDCS instruction is based on direct addressing,
where the address is part of the instruction operands. The LDCS
instruction can access only the UPDI CS register space. This instruction supports only
byte access, and the data size is not configurable.
Figure 1.
LDCS Instruction
Operation
Figure 1 shows a typical example of LDCS data transmission.
A data byte from the LDCS is transmitted from the UPDI after the guard
time is completed.