Technique for rffe and spmi register-0 write datagram functional extension

A sending device for sending a write command to a receiver, comprising:

• a bus interface;
• and
• a processing circuit configured to:
• set a configuration register to indicate an operation mode of the write command,
• generate a command code field in the write command, wherein a most significant bit of the command code field has a value of 1 and remaining bits of the command code field are defined based on the operation mode,
• include payload bytes in a payload field of the write command based on the operation mode, and
• send the write command to the receiver via the bus interface.

A method of receiving a write command from a sender via a bus interface, comprising:

• receiving a mode setting message for setting a configuration register to indicate an operation mode of the write command;
• receiving the write command from the sender;
• reading a command code field in the write command, wherein a most significant bit of the command code field has a value of 1 and remaining bits of the command code field are interpreted based on the operation mode;
• and
• detecting whether a payload field of the write command includes payload bytes to be processed based on the operation mode.

A receiving device for receiving a write command from a sender, comprising:

• a bus interface;
• and
• a processing circuit configured to:
• receive a mode setting message for setting a configuration register to indicate an operation mode of the write command,
• receive the write command from the sender via the bus interface,
• read a command code field in the write command, wherein a most significant bit of the command code field has a value of 1 and remaining bits of the command code field are interpreted based on the operation mode, and
• detect whether a payload field of the write command includes payload bytes to be processed based on the operation mode.