4.3 Interface Register
C156-E227-01EN
4-9
4.3.1.7 ATAPI Block Device Select register
This register's bits are defined as shown below.
Table 4.8 Bit definitions of ATAPI Block Device Select register
7
6
5
4
3
2
1
0
Unused
Unused
Unused
Dev
Unused
Unused
R/W
•
Bits 7, 6, 5, 3, 2, 1, and 0 are not used. The ODD ignores all value sets in
these bits.
•
Dev indicates the device address. When Dev is 0, device 0 is selected and
when Dev is 1, device 1 is selected.
•
Logical unit numbers (LUNs) are not supported. The ODD ignores all such
set values.
4.3.1.8 Error register
This register indicates the status of the final command.
The value of this register is effective when the ERR bit of the Status register is 1 at
completion of a command other than EXECUTE DEVICE DIAGNOSTIC.
The value of this register indicates the diagnostic code at power-on, reset, and
execution of the EXECUTE DEVICE DIAGNOSTIC command. For details on
diagnostic codes, see Section 4.5.5.
Table 4.9 Bit definitions of Error register
7
6
5
4
3
2
1
0
Sense Key
MCR
(0b)
ABRT
EOM
(0b)
ILI
(0b)
Read
•
For the Sense Key, see Table 4.99.
•
MCR (Media Change Requested) is not used. It is always 0.
•
ABRT (Aborted Command) indicates that the value of the ATA command
code or task file register is incorrect.
•
EOM (End of Media) is not used. It is always 0.
•
ILI (Illegal Length Indication) is not used. It is always 0.
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