C141-E045-02EN
5 - 33
(13)
IDENTIFY DEVICE DMA (X'EE')
When this command is not used to transfer data to the host in DMA mode, this command
functions in the same way as the Identify Device command.
At command issuance (I/O registers setting contents)
1F7
H
(CM)
1
1
1
0
1
1
1
0
1F6
H
(DH)
×
×
×
DV
xx
1F5
H
(CH)
1F4
H
(CL)
1F3
H
(SN)
1F2
H
(SC)
1F1
H
(FR)
xx
xx
xx
xx
xx
At command completion (I/O registers contents to be read)
1F7
H
(ST)
Status information
1F6
H
(DH)
×
×
×
DV
xx
1F5
H
(CH)
1F4
H
(CL)
1F3
H
(SN)
1F2
H
(SC)
1F1
H
(ER)
xx
xx
xx
xx
Error information
(14)
SET FEATURES (X'EF')
The host system issues the SET FEATURES command to set parameters in the Features
register for the purpose of changing the device features to be executed. For the transfer mode
(Feature register = 03), detail setting can be done using the Sector Count register.
Upon receipt of this command, the device sets the BSY bit of the Status register and saves the
parameters in the Features register. Then, the device clears the BSY bit, and generates an
interrupt.
If the value in the Features register is not supported or it is invalid, the device posts an
ABORTED COMMAND error.
Table 5.5 lists the available values and operational modes that may be set in the Features
register.
Summary of Contents for MPB3021AT
Page 1: ...C141 E045 02EN MPB3021AT MPB3032AT MPB3043AT MPB3052AT MPB3064AT DISK DRIVES PRODUCT MANUAL ...
Page 3: ......
Page 7: ......
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Page 31: ......
Page 33: ...C141 E045 02EN 3 2 Figure 3 1 Dimensions ...
Page 48: ...C141 E045 02EN 4 5 Figure 4 2 MPB30xxAT Block diagram ...
Page 54: ...C141 E045 02EN 4 11 Figure 4 4 Read write circuit block diagram ...
Page 56: ...C141 E045 02EN 4 13 Figure 4 6 PR4 signal transfer ...