Transport Layer; Ssp Frame Format; Table 1.32 Ssp Frame Format - Fujitsu MBA3073RC SERIES Technical Manual

SAS Interface

1.6 Transport layer

1.6.1 SSP frame format

This layer defines the processing of each of a COMMAND frame, TASK frame,
DATA frame, XFER_RDY frame and RESPONSE frame.
Table 1.32 contains the definitions of the SSP frame format. An SSP frame
consists of the header part, information unit part, and CRC.
Bit
7
Byte
0
1 (MSB)
3
4
5 (MSB)
7
8
9
10
11
12
13
15
16 (MSB)
17
18 (MSB)
19
20 (MSB)
23
24 (MSB)
m
n-3 (MSB)
n
78

Table 1.32 SSP frame format

6 5 4
FRAME TYPE
HASHED DESTINATION SAS ADDRESS
Reserved
HASHED SOURCE SAS ADDRESS
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
TAG
TARGET PORT TRANSFER TAG
DATA OFFSET
INFORMATION UNIT
Fill bytes (0 to 3bytes)
CRC
3 2 1
RETRY CHANGING
RETRA-
DATA
NSMIT
FRAMES
NUMBER OF FILL
BYTES
0
(LSB)
(LSB)
DATA
POINTER
(LSB)
(LSB)
(LSB)
(LSB)
(LSB)
C141-C013