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8.1 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 35 defines the Byte sequence of the Check Power Mode command.
Table 35: 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
8.2 Erase Sector(s) (C0h)
This command is used to pre-erase and condition data sectors prior to a Write Sector without Erase
command or a Write Multiple Without Erase command. There is no data transfer associated with this
command but a Write Fault error status can occur. Table 36 defines the Byte sequence of the Erase Sector
command.
Table 36: Erase Sector(s)
Task File Register
7
6
5
4
3
2
1
0
COMMAND
C0h
DRIVE/HEAD
nu
L
nu
D
H[3:0] or LBA[27:24] of the starting
sector/LBA
CYLINDER HI
CYLINDER LOW
SECTOR NUM
SECTOR COUNT
FEATURES
Cylinder[15:8] or LBA[23:16] of the first sector/LBA to erase
Cylinder[7:0] or LBA[15:8] of the first sector/LBA to erase
Sector[7:0] or LBA[7:0] of the first sector/LBA to erase
The number of sectors/logical blocks to erase
nu
8.3 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 37 defines the Execute Drive Diagnostic command Byte sequence. The Diagnostic codes shown in Table
38 are returned in the Error Register at the end of the command.
Table 37: 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: 1.00
CH-9552 Bronschhofen
Switzerland
www.swissbit.com
industrial@swissbit.com
P-120_data_sheet_PA-QxBO_Rev100.doc
Page 39 of 76
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