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ATA REGISTERS SSD-DXXX(I)-4210 DATA SHEET
SILICONSYSTEMS PROPRIETARY
This document and the information contained within it is confidential and proprietary to SiliconSystems, Inc.
All unauthorized use and/or reproduction is prohibited.
4210D-03DSR PAGE 35 FEBRUARY 2, 2009
STATUS REGISTER
The Status register provides the device’s current status to the host. The status
register is an 8-bit read-only register. When the contents of the register are
read by the host, the IREQ# bit is cleared.
Table 22: Status Register
Operation
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
Read/Write BSY DRDY DWF DSC DRQ CORR IDX ERR
Default Value 0 0 0 0 0 0 0 0
Bit(s) Description
7 Busy (BSY). Set when the drive is busy and unable to process any
new ATA commands.
6 Data Ready (DRDY). Set when the device is ready to accept ATA
commands from the host.
5 Drive Write Fault (DWF). Always set to 0.
4 Drive Seek Complete (DSC). Set when the drive heads have been
positioned over a specific track.
3 Data Request (DRQ). Set when a device is ready to transfer a word
or byte of data to or from the host and the device.
2 Corrected Data (CORR). Always set to 0.
1 Index (IDX). Always set to 0.
0 Error (ERR). Set when an error occurs during the previous ATA
command.