Hitachi 7K320 Specifications - Page 46

Device Register, Error Register, Features Register

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Bit Definitions SRST (RST) -IEN 7K320 SATA OEM Specification Software Reset. The device is held reset when RST=1. Setting RST=0 reenables the device. The host must set RST=1 and wait for at least 5 microseconds before setting RST=0, to ensure that the device recognizes the reset. Interrupt Enable. When IEN=0, and the device is selected, device interrupts to the host will be enabled. When IEN=1, or the device is not selected, device interrupts to the host will be disabled. 11.4 Device Register 7 6 5 - L - Table 26 Device Register Device Register 4 3 2 1 0 0 HS3 HS2 HS1 HS0 This register contains the device and head numbers. Bit Definitions L HS3,HS2,HS1,HS0 Binary encoded address mode select. When L=0, addressing is by CHS mode. When L=1, addressing is by LBA mode. The 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. 11.5 Error Register 7 6 5 CRC UNC 0 Table 27 Error Register Error Register 4 3 IDNF 0 2 ABRT 1 TK0NF 0 AMNF This register contains status from the last command executed by the device, or a diagnostic code. At the completion of any command except Execute Device Diagnostic, the contents of this register are valid always even if ERR=0 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 31 Diagnostic Codes" on Page 50 for the definition. Bit Definitions ICRCE (CRC) UNC IDNF (IDN) ABRT (ABT) TK0NF (T0N) AMNF (AMN) Interface CRC Error. CRC=1 indicates a CRC error has occurred on the data bus during a Ultra-DMA transfer. Uncorrectable Data Error. UNC=1 indicates an uncorrectable data error has been encountered. ID Not Found. IDN=1 indicates the requested sector's ID field could not be found. Aborted Command. ABT=1 indicates the requested command has been aborted due to a device status error or an invalid parameter in an output register. Track 0 Not Found. T0N=1 indicates track 0 was not found during a Recalibrate command. Address Mark Not Found. AMN=1 indicates the data address mark has not been found after finding the correct ID field for the requested sector. This bit is obsolete. 11.6 Features Register This register is command specific. This is used with the Set Features command, S.M.A.R.T. Function Set command and Format Unit command. Page 46 of 176

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7K320 SATA OEM Specification
Page 46 of 176
Bit Definitions
SRST (RST)
Software Reset. The device is held reset when RST=1. Setting RST=0 reenables the device.
The host must set RST=1 and wait for at least 5 microseconds before setting RST=0, to
ensure that the device recognizes the reset.
-IEN
Interrupt Enable. When IEN=0, and the device is selected, device interrupts to the host will
be enabled. When IEN=1, or the device is not selected, device interrupts to the host will be
disabled.
11.4
Device Register
Device Register
7
6
5
4
3
2
1
0
-
L
-
0
HS3
HS2
HS1
HS0
Table 26 Device Register
This register contains the device and head numbers.
Bit Definitions
L
Binary encoded address mode select. When L=0, addressing is by CHS mode. When L=1,
addressing is by LBA mode.
HS3,HS2,HS1,HS0
The 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.
11.5
Error Register
Error Register
7
6
5
4
3
2
1
0
CRC
UNC
0
IDNF
0
ABRT
TK0NF
AMNF
Table 27 Error Register
This register contains status from the last command executed by the device, or a diagnostic code.
At the completion of any command except Execute Device Diagnostic, the contents of this register
are valid always even if ERR=0 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 31 Diagnostic Codes” on Page 50 for the definition.
Bit Definitions
ICRCE (CRC)
Interface CRC Error. CRC=1 indicates a CRC error has occurred on the data bus during a
Ultra-DMA transfer.
UNC
Uncorrectable Data Error. UNC=1 indicates an uncorrectable data error has been
encountered.
IDNF (IDN)
ID Not Found. IDN=1 indicates the requested sector’s ID field could not be found.
ABRT (ABT)
Aborted Command. ABT=1 indicates the requested command has been aborted due to a
device status error or an invalid parameter in an output register.
TK0NF (T0N)
Track 0 Not Found. T0N=1 indicates track 0 was not found during a Recalibrate command.
AMNF (AMN)
Address Mark Not Found. AMN=1 indicates the data address mark has not been found after
finding the correct ID field for the requested sector.
This bit is obsolete.
11.6
Features Register
This register is command specific. This is used with the Set Features command, S.M.A.R.T. Function
Set command and Format Unit command.