7.3.4.11 Reading and Writing Memory/SFR Registers

To read from or write to an internal resource, such as a memory or SFR registers, the OCI Single Step mode is used. In this mode, the external debugger can feed in an instruction sequence to perform the requested read/write operation. Read values are placed into the accumulator, which may then be read out of the result register using the DebugNOP JTAG instruction.