Dispatch instructions to the SBPI interface, used for programming the OTP fuses.
| SHORT_WDATA | wdata to be used only when payload_size_m1=0 |
| CMD | |
| TARGET | Instruction target, it can be PMC (0x3a) or DAP (0x02) |
| PAYLOAD_SIZE_M1 | Instruction payload size in bytes minus 1 |
| HAS_PAYLOAD | Instruction has payload (data to be written or to be read) |
| IS_WR | Payload type is write |
| EXEC | Execute instruction |