參數(shù)資料
型號: ISD-300A1
英文描述: Universal Serial Bus
中文描述: 通用串行總線
文件頁數(shù): 40/67頁
文件大?。?/td> 580K
代理商: ISD-300A1
ISD-300A1
35
October 19, 2001
Vendor-Specific ATA Commands
There are two vendor-specific ATA commands implemented in the ISD-300A1. These commands are
shown in
Table 16
.
Label
Command
Code
IDENTIFY
FBh
This command is used to read ISD-300A1 configuration data and USB
descriptor data from an attached mass storage device.
EVENT_NOTIFY
Specified in
Configuration
Data
Description
This command communicates certain events to the device and is executed as
the events occur.
Table 16 – Vendor-Specific ATA Commands
IDENTIFY
The vendor-specific Identify (FBh) command enables the ISD-300A1 to request configuration and USB
descriptor information from an attached mass storage device.
Command Code
FBh
Protocol
PIO data-in (refer to
ATA/ATAPI-5 Specification
, section 9.7).
Identification Register Writes
Register
7
6
5
Features
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
obs
N/A
obs
Command
4
3
2
1
0
N/A
N/A
N/A
N/A
N/A
DEV
0
0
0
1
FBh
Table 17 - Identification Register Writes
Device/Head register –
The DEV bit indicates the selected device.
Identification Register Reads
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
BSY
N/A
N/A
obs
N/A
DEV
N/A
N/A
DRQ
N/A
N/A
N/A
N/A
N/A
ERR
Table 18 - Identification Register Reads
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