Datasheet

1.9 FC-4 Device Data
C141-C008 1-85
1.9.1.2 Command descriptor block
bit76543210
WD Byte
30Operation Code
Group Code Command Code
1Reserved
= h ‘00’
2(MSB)
3
40
1
Logical Block Address
(LSB)
2Reserved
= h ‘00’
3(MSB)
50
Transfer Length
1 Control Byte
Reserved
= b ‘000’
NACA Flag Link
bit76543210
WD Byte
30Operation Code
Group Code Command Code
1Reserved
= b ‘000’
(MSB)
2
3
Logical Block Address
(LSB)
4 0 Transfer Length
1 Control Byte
Reserved
= b ‘000’
NACA Flag Link
Figure 1.48 Command descriptor block
This section indicates the 6 byte and 10 byte CDB.
(1) Operation Code [PL:W03/B0]
For details of Operation Code, refer to Chapter 4.
The Upper 3 bit of Operation Code indicates the Group Code.
0000b, Group-0, 6 byte commands
001b, Group-1, 10 byte commands
010b, Group-2, 10 byte commands
011b, Group-3, received
100b, Group-4, 16 byte commands