DPA Request consists of a foursome with optional data, depending on the actual request. DPA Request is executed only if the specified HW profile ID matches the HW profile ID of the device unless the HW profile ID in the foursome equals 0xFFFF (HWPID_DoNotCheck). In some scenarios, the request can be asynchronously sent from [N] to [C]. Then it is marked as asynchronous the same way as asynchronous DPA Response.