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Bit
Definitions
L
Binary encoded address mode select. When L = 0, addressing is by CHS mode. When L = 1,
addressing is by LBA mode.
DRV
Device. When DRV = 0, device 0 (master) is selected. When DRV = 1, device 1 (Slave) is
selected.
HS3, HS2,
Head Select. These four bits indicate binary encoded address of the head. HS0 is the least signifi-
HS1, HS0
cant bit. At command completion, these bits are updated to reflect the currently selected head.
The head number may be from zero to the number of heads minus one.
In LBA mode, HS3 through HS0 contain bits 24-27 of the LBA. At command completion, these
bits are updated to reflect the current LBA bits 24-27.
2.8 Error Register
Table 4: Error Register
ICRCE
This register contains the status from the last command executed by the device or a diagnostic code. At the comple-
tion of any command, except Execute Device Diagnostic, the contents of this register are always valid even if
ERR = 0 is in the Status Register.
Following a power on, a reset, or completion of an Execute Device Diagnostic command, this register contains a
diagnostic code. See Table 9: 'Diagnostic codes" on page 10 for the definitions.
Bit
Definitions
ICRCE
Interface CRC Error. When CRC = 1, it indicates that a CRC error has occurred on the data bus
(CRC)
during a Ultra DMA transfer.
UNC
Uncorrectable Data Error. When UNC = 1 it indicates that an uncorrectable data error has been
encountered.
IDNF
ID Not Found. When IDN = 1, it indicates that the requested sector's ID field could not be found.
(IDN)
ABRT
Aborted Command. When ABT = 1, it indicates that the requested command has been aborted
(ABT)
due to a device status error or an invalid parameter in an output register.
TK0NF
Track 0 Not Found. When T0N = 1, it indicates that track 0 was not found during a Recallibrate
(T0N)
command.
AMNF
Address Mark Not Found. This product does not report this error. This bit is always zero.
(AMN)
2.9 Features Register
This register is command specific. It is used with the Set Features command, the S.M.A.R.T. Function Set com-
mand, and the Format Unit command.
7
6
5
UNC
0
Deskstar 7K500 Hard Disk Drive Serial ATA Addendum
4
3
2
IDNF
0
ABRT
5
1
0
TK0NF
AMNF
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