5. ATA/ATAPI Interface
SONY AIT-2 Turbo drive SDX-560V series Ver.1.0
5-3
Error register
This register contains status for the current command. Following a power on, a hardware or software reset, or
command completion of an EXECUTE DEVICE DIAGNOSTIC or DEVICE RESET command, this register contains
a diagnostic code.
At command completion of any command except EXECUTE DEVICE DIAGNOSTIC, the contents of this register
are valid when the ERR bit is equal to one in the Status register.
7 6 5 4 3 2 1 0
# # # # #
ABRT
# #
- Bit 2 - ABRT (command aborted) is set to one to indicate the requested command has been command
aborted because the command code or a command parameter is invalid or some other error has occurred.
- # -The content of this bit is command dependent.
Features register
The content of this register is command dependent and becomes a command parameter when the Command
register is written.
Sector Count register
The content of this register is command dependent and becomes a command parameter when the Command
register is written.
Sector Number register
The content of this register is command dependent and becomes a command parameter when the Command
register is written.
Status register
This register contains the device status. The contents of this register are updated to reflect the current state of the
device and the progress of any command being executed by the device.
7 6 5 4 3 2 1 0
BSY DRDY # DSC DRQ obsolete
obsolete ERR
BSY is set to one to indicate that the device is busy. After the host has written the Command register the device
shall have either the BSY bit set to one, or the DRQ bit set to one, until command completion or the device has
performed a bus release for an overlapped command.
DRDY is set to one to indicate that the device is ready to accept a new command.
DSC is used with ATAPI packet commands to provide efficient use of the IDE bus by allowing overlapped
commands to be sent to the other IDE Device on the same cable while the SDX-560V is executing a command.
This field is not supported.
DRQ indicates that the device is ready to transfer a word of data between the host and the device. After the host
has written the Command register the device shall either set the BSY bit to one or the DRQ bit to one, until
command completion or the device has performed a bus release for an overlapped command.
ERR indicates that an error occurred during execution of the previous command. For the PACKET and SERVICE
commands, this bit is defined as CHK and indicates that an exception condition exists.
Содержание AIT-SDX560
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