SAS Interface
62 C141-C013
1.5.3 OPEN address frame Table 1.21 defines the OPEN address frame format used for connection requests.
Table 1.21 OPEN address frame format
Bit
Byte 7 6 5 4 3 2 1 0
0 INITIATO
R PORT PROTOCOL ADDRESS FRAME TYPE (1h)
1 FEATURES CONNECTION RATE
2 (MSB)
3 INITIATOR CONNECTION TAG (LSB)
4
11 DESTINATION SAS ADDRESS
12
19 SOURCE SAS ADDRESS
20 COMPATIBLE FEATURES
21 PATHWAY BLOCKED COUNT
22 (MSB)
23 ARBITRARION WAIT TIME (LSB)
24
27 MORE COMPATIBLE FEATURES
28 (MSB)
31 CRC (LSB)
An INITIATOR PORT bit set to one specifies that the source port is acting as a
SAS INIT port. An INITIATOR PORT bit set to zero specifies that the source
port is acting as a SAS TARG port.
The PROTOCOL field specifies the protocol for the connection being requested
and is defined in Table 1.22.
Table 1.22 PROTOCOL field
Code Description
000b SMP
001b SSP
010b STP
All others Reserved