Table 1.33 Frame Type Field - Fujitsu MAU3147RC SERIES Technical Manual

Table 1.33 defines the FRAME TYPE field.
Code Name of frame
01h DATA frame
05h XFER_RDY
frame
06h COMMAND
frame
07h RESPONSE frame Response
16h TASK frame
All others Reserved (unknown frame)
The HASHED DESTINATION SAS ADDRESS field contains the hashed value
of the destination SAS address.
The HASHED SOURCE SAS ADDRESS field contains the hashed value of the
source SAS address
The RETRY DATA FRAMES bit is set to one for XFER_RDY frames and shall
be set to zero for all other frame types. When set to one this bit specifies that the
SSP INIT port may retry write DATA frames that fail.
The RETRANSMIT bit is set to one for TASK frames, RESPONSE frames, and
XFER_RDY frames and shall be set to zero for all other frame types. This bit
specifies that the frame is a retransmission after the SSP port failed in its previous
attempt to transmit the frame.
The CHANGING DATA POINTER bit is set to one for DATA frames and shall
be set to zero for all other frame types. When set to one this bit specifies that the
frame is a retransmission after the SSP TARG port failed in its previous attempt
to transmit the frame or a subsequent frame and the dataoffset field of the frame
may not be sequentially increased from that of the previous frame.
The NUMBER OF FILL BYTES field specifies the number of fill bytes between
the INFORMATION UNIT field and the CRC field. The NUMBER OF FILL
BYTES field shall be set to zero for all frame types except DATA frames (i.e., all
other frame types are already four-byte aligned).
C141-C009

Table 1.33 FRAME TYPE field

Information Unit
DATA INIT or TARG
Transfer ready SSP TARG port
Command SSP INIT port
SSP TARG port
Task SSP INIT port
management
function
1.6 Transport layer
Information unit size
Originator
1 to 1024
12
28
NO_DATA: 24
RESPONSE_DATA: 28
SENSE_DATA: 72
28
(bytes)
1-59