Fujitsu MHY2040BH 用户手册

C141-E262 

5-21 

 

Error 

R  Status Hi R Status Lo R

I  R

Reserved (0) 

FIS Type (A1h) 

0 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SActive 31:0 

1 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The Set Device Bits - 

Device to Host FIS is used by the device to load Shadow 
Command Block bits for which the device has exclusive write 
access.  These bits are the eight bits of the Error register and six of 
the eight bits of the Status register. This FIS does not alter bit 7, 
BSY, or bit 3, DRQ, of the Shadow Status register. 

FIS Type - 

Set to a value of A1h. Defines the rest of the FIS fields. Defines the 
length of the FIS as two Dwords.  

I - 

Interrupt Bit. This bit signals the host adapter to enter an interrupt 
pending state if both the BSY bit and the DRQ bit in the shadow 
Status register are zero when the frame is received.  

Error - 

Contains the new value of the Error register of the Shadow 
Register Block.  

Status-Hi - 

Contains the new value of bits 6, 5, and 4 of the Status register of 
the Shadow Register Block.  

Status-Lo - 

Contains the new value of bits 2,1, and 0 of the Status register of 
the Shadow Register Block.  

SActive - 

The SActive field of the Set Device Bits FIS communicates 
successful completion notification for each of up to 32 queued 
commands. The field is bit-significant and the device sets bit 
positions to one for each command tag it is indicating successful 
completion notification for. The device may set more than one bit 
to one if it is explicitly aggregating successful status returns. The 
device shall only indicate completion notification for a command if 
it has completed successfully.