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6.1 Check Power Mode (98h or E5h)
This command checks the power mode.
Issuing the command while the Drive is in Standby mode, is about to enter Standby, or is exiting Standby, the
command will set BSY, set the Sector Count Register to 00h, clear BSY and generate an interrupt.
Issuing the command when the Drive is in Idle mode will set BSY, set the Sector Count Register to FFh, clear BSY
and generate an interrupt.
Table 14: Check Power Mode
Task File Register
7
6
5
4
3
2
1
0
COMMAND
98h or E5h
DRIVE/HEAD
nu
nu
nu
D
nu
CYLINDER HI
CYLINDER LOW
SECTOR NUM
SECTOR COUNT
FEATURES
nu
nu
nu
nu
nu
6.2 Data Set Management (06h) TRIM
This 48-bit command is optional for ATA devices. The DATA SETMANAGEMENT command is not part of any feature
set.
The DATA SET MANAGEMENT command provides information for device optimization (e.g., file system
information).
See Table 15 for the DATA SET MANAGEMENT command inputs.
Table 15: Data Set Management
register write
previous
current
Task File Register
15:8
7
6
5
4
3
2
1
0
COMMAND
nu
06h
DRIVE/HEAD
nu
nu
L
nu
Transport
Reserved
dependent
LBA High
LBA Mid
LBA Low
Reserved
Reserved
Reserved
SECTOR COUNT
15:8
7:0 Number of 512-byte blocks to be transferred; the value of zero is reserved.
FEATURES
Reserved
TRIM
Currently this command is specified only for the TRIM command.
Currently only one 512-byte block can be transferred with one command (see Identify Device word 169).
Detailed information about the TRIM command is available in the ATA/ATAPI Command Set-2 (ACS-2) at
6.3 Execute Drive Diagnostic (90h)
This command performs the internal diagnostic tests implemented by the Drive.
The Drive bit is ignored and the diagnostic command is executed by both the Master and the Slave with the
Master responding with the status for both devices.
Table 16 defines the Execute Drive Diagnostic command Byte sequence. The Diagnostic codes shown in Table 17
are returned in the Error Register at the end of the command.
Table 16: Execute Drive Diagnostic
Task File Register
7
6
5
4
3
2
1
0
COMMAND
90h
DRIVE/HEAD
nu
nu
nu
D
nu
CYLINDER HI
CYLINDER LOW
SECTOR NUM
SECTOR COUNT
FEATURES
nu
nu
nu
nu
nu
Swissbit AG
Industriestrasse 4
Swissbit reserves the right to change products or specifications without notice.
Revision: 0.92
CH-9552 Bronschhofen
Switzerland
F-240_data_sheet_CA-HxBV_Rev092.doc
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