Silicon Image SSD-P08G(I)-3521 manual Status Register, BSY Drdy, DRQ Corr IDX ERR

ATA REGISTERS SSD-PXXX(I)-3521 DATA SHEET

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 41: Status Register

Operation	D7	D6	D5	D4	D3	D2	D1	D0
Read/Write	BSY	DRDY	DWF	DSC	DRQ	CORR	IDX	ERR
Default Value	0	0	0	0	0	0	0	0

Bit(s) Description

7Busy (BSY). Set when the drive is busy and unable to process any new ATA commands.

6Data Ready (DRDY). Set when the device is ready to accept ATA commands from the host.

5Drive Write Fault (DWF). Always set to 0.

4Drive Seek Complete (DSC). Set when the drive heads have been positioned over a specific track.

3Data Request (DRQ). Set when a device is ready to transfer a word or byte of data to or from the host and the device.

2Corrected Data (CORR). Always set to 0.

1Index (IDX). Always set to 0.

0Error (ERR). Set when an error occurs during the previous ATA command.

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3521P-02DSR PAGE 54 FEBRUARY 2, 2009