ISD-200 Datasheet, PDF (37/64 Pages) List of Unclassifed Manufacturers – USB Mass Storage Class Bulk-Only Specification Compliant

ISD-200 ASIC Datasheet
Vendor-Specific ATA Commands
There are two vendor-specific ATA commands implemented in the ISD-200. They are shown in the
following table.
Label
IDENTIFY
EVENT_NOTIFY
Command
Code
FBh
Specified in
Configuration
Data
Description
This command is used to read ISD-200 configuration data and USB descriptor
data from an attached mass storage device.
This command communicates certain events to the device and is executed as
the events occur.
Table 14 – Vendor-Specific ATA Commands
IDENTIFY
The vendor-specific Identify (FBh) command enables the ISD-200 to request configuration and USB
descriptor information from an attached mass storage device.
Command Code
FBh
Feature Set
The PACKET Command feature set may or may not be implemented.
Protocol
PIO data-in (refer to ATA/ATAPI-4 Specification, section 9.7).
Input
Register
Features
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Command
7
6
5
4
3
2
1
0
N/A
N/A
N/A
N/A
N/A
obs
N/A
obs
DEV
N/A
N/A
N/A
N/A
FBh
Device/Head register –
The DEV bit indicates the selected device.
Normal Outputs
Register
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
7
6
5
4
3
2
1
0
N/A
N/A
N/A
N/A
N/A
obs
N/A
obs
DEV
N/A
N/A
N/A
N/A
BSY
N/A
N/A
N/A
DRQ
N/A
N/A
ERR
In-System Design Confidential
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