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6.6 Idle (97h or E3h)
This command causes the Drive to set BSY, enter the Idle mode, clear BSY and generate an interrupt. If the sector
count is non-zero, it is interpreted as a timer count (each count is 5ms) and the automatic power down mode is
enabled. If the sector count is zero, the automatic power down mode is disabled. Note that this time base (5ms)
is different from the ATA specification. Table 22 defines the Byte sequence of the Idle command.
Table 22: Idle
Task File Register
7
6
5
4
3
2
1
0
COMMAND
97h or E3h
DRIVE/HEAD
nu
nu
nu
D
nu
CYLINDER HI
CYLINDER LOW
SECTOR NUM
SECTOR COUNT
FEATURES
nu
nu
nu
Timer Count (5ms increments)
nu
6.7 Idle Immediate (95h or E1h)
This command causes the Drive to set BSY, enter the Idle mode, clear BSY and generate an interrupt. Table 23
defines the Idle Immediate command Byte sequence.
Table 23: Idle Immediate
Task File Register
7
6
5
4
3
2
1
0
COMMAND
95h or E1h
DRIVE/HEAD
nu
nu
nu
D
nu
CYLINDER HI
CYLINDER LOW
SECTOR NUM
SECTOR COUNT
FEATURES
nu
nu
nu
nu
nu
6.8 NOP (00h)
This command always fails with the Drive returning command aborted. Table 24 defines the Byte sequence of
the NOP command.
Table 24: NOP
Task File Register
7
6
5
4
3
2
1
0
COMMAND
00h
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: 1.41
CH-9552 Bronschhofen
Switzerland
www.swissbit.com
industrial@swissbit.com
F-100_data_sheet_CA-HxBR_Rev141.doc
Page 22 of 51
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