Table 59

+========-============================-===================+ 
|  Mode  |  Description               |    Type           | 
|--------+----------------------------+-------------------| 
|  000b  |  Combined header and data  |  Optional         | 
|  001b  |  Vendor-specific           |  Vendor-specific  | 
|  010b  |  Data                      |  Optional         | 
|  011b  |  Descriptor                |  Optional         | 
|  100b  |  Reserved                  |  Reserved         | 
|  101b  |  Reserved                  |  Reserved         | 
|  110b  |  Reserved                  |  Reserved         | 
|  111b  |  Reserved                  |  Reserved         | 
+=========================================================+