USB 2.0 ATA/ATAPI Controller with PD-DRM

Datasheet

Revision 0.2 (01-16-07)

16

SMSC USB2005

DATASHEET

7.2.1

Device Serial Number & Page Length (Bytes 3 & 4...n)

In response to a SCSI INQUIRY Command, the USB2005 firmware will read the “Device Identify

Information” of an IDE drive. The Device Serial Number is created by removing all NULL code (00h)

and BLANK code (20h) characters from the “Device Identify Information” response. The Device Serial

Number is reported in Byte 4...n (see Table 7.2). The number of characters of the Device Serial

Number will be reported as the Page Length (Byte 3) see Table 7.2.

As a simple example, If the Device Identify Information of an IDE drive is 713 740, then the USB2005

will return 713740 as the Device Serial Number with a Page Length of 6.