7K200 SATA OEM Specification
11.2 Command register
This register contains the command code being sent to the device. Command execution begins immediately after this register is written. The command set is shown in “Table 40 Command set” on page 74.
All other registers required for the command must be set up before writing the Command Register.
11.3 Device Control Register
Device Control Register
7
-
6
-
5
-
4
-
3
1
2
SRST
1
0
0
Table 25 Device Control Register
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. |
| 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
L
5
-
4
0
3
HS3
2
HS2
1
HS1
0
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 |
| are updated to reflect the current LBA bits |
11.5 Error Register
Error Register
7
CRC
6
UNC
5
0
4
IDNF
3
0
2
ABRT
1
TK0NF
0
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 51 for the definition.
Bit Definitions |
|
ICRCE (CRC) | Interface CRC Error. CRC=1 indicates a CRC error has occurred on the data bus during a |
| |
UNC | Uncorrectable Data Error. UNC=1 indicates an uncorrectable data error has been |
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