Fujitsu MBC2073RC Manual Do Utilizador

 

C141-C013 

33 

Drives start the link reset sequence when they detect any of the following 
conditions: 

• 

The power is turned on. 

• 

A loss of signal is detected (OOB from the INIT). 

• 

A loss of sync is detected. 

• 

A HARD_RESET primitive is received during the link reset sequence. 

• 

A hot-plug timeout (500 ms) is detected during the link reset sequence. 

• 

The IDENTIFY address frame could not be received. 

Out of band (OOB) signals are low-speed signal patterns detected by the phy that 
do not appear in normal data streams. They consist of defined amounts of idle 
time followed by defined amounts of burst time. During the idle time, D.C. idle is 
transmitted. During the burst time, ALIGN (0) primitives are transmitted 
repeatedly.  The signals are differentiated by the length of idle time between the 
burst times. 

Parameter 

Minimum 

Nominal 

Maximum 

Comments 

OOB interval 
(OOBI) *1 
 

666,600 ps 

666,666 ps 

666,733 ps 

The time basis for burst times and 
idle times used to create OOB 
signals. Based on 1,5 Gbps clock 
tolerance. 

COMSAS detect 
timeout 

13,65 ìs 

−

 

−

 

The minimum time a receiver shall 
allow to detect COMSAS after 
transmitting COMSAS.   
Derived from:  OOBI 

×

 512 

×

 40 

*1 

The OOBI is different from the UI (OOB) defined in SATA (for example, 
stricter clock tolerance applies to SAS).  This is because the OOBI is a 
fixed value that is equal to the UI value of G1, and that does not depend on 
actual transfer speed used to set up the burst time. 

Table 1.5 describes the OOB signal transmitter requirements for the burst time, 
idle time, and negation times that comprise each OOB signal.