Fujitsu MCP3130SS Manuale Utente

7-38 C156-E228-02EN 

 Data Release Delay + Bus Settle Delay (Min)

 Deskew Delay (Max)

 Data Release Delay (Max)

 

The ODD has a time monitoring feature for the SCSI bus to prevent hang-up of 
the SCSI bus in the case that the TARG cannot receive a response from the INIT 
in the RESELECTION or INFORMATION TRANSFER phase. 

(1)  Time monitoring in RESELECTION phase 

The ODD monitors the time of the response (BSY signal) from the INIT in the 
RESELECTION phase.  When the INIT does not send the BSY signal within a 
specified period, the ODD executes the timeout process (see Subsection 7.6.4) to 
free the SCSI bus and then executes the retry process (see Section 6.1) of the 
RESELECTION phase in "MCD3130SS, MCE3130SS, MCK3130SS, 
MCM3064SS, MCM3130SS Optical Disk Drives SCSI Logical Interface 
Specifications."   

(2)  Time monitoring in INFORMATION TRANSFER phase 

The ODD monitors the timing of the ACK signal against the REQ signal in the 
INFORMATION TRANSFER phase.  Time monitoring is executed during the 
following period: 

• 

COMMAND, STATUS, or MESSAGE phase: 

Time taken from the moment of sending the REQ signal of the first byte to the 
moment of completing the reception of the ACK signal of the last byte of the 
phase.