Execution Example Of Read Multiple Command - Fujitsu MPC3096AT - Desktop 9.7 GB Hard Drive Product Manual

Figure 5.2 shows an example of the execution of the READ MULTIPLE command.
Block count specified by SET MULTIPLE MODE command = 4 (number of sectors in a
block)
READ MULTIPLE command specifies;
Number of requested sectors = 9 (Sector Count register = 9)
Number of sectors in incomplete block = remainder of 9/4 =1
Command Issue
Parameter
Write
~
BSY
DRDY
INTRQ
DRQ
Sector
transferred
Figure 5.2

Execution example of READ MULTIPLE command

At command issuance (I/O registers setting contents)
1F7 (CM) 1
H
1F6 (DH)
H
1F5 (CH)
H
1F4 (CL)
H
1F3 (SN)
H
1F2 (SC)
H
1F1 (FR)
H
At command completion (I/O registers contents to be read)
1F7 (ST)
H
1F6 (DH)
H
1F5 (CH)
H
1F4 (CL)
H
1F3 (SN)
H
1F2 (SC)
H
1F1 (ER)
H
Status read
1 2 3 4
Block
1 0 0 0
L DV Start head No. /LBA [MSB]
Start cylinder No. [MSB]/ LBA
Start cylinder No. [LSB] / LBA
Start sector No.
Transfer sector count
xx
Status information
L DV End head No. /LBA [MSB]
End cylinder No. [MSB] / LBA
End cylinder No. [LSB] / LBA
End sector No.
00
H
Error information
C141-E055-01EN
Status read
5 6 7 8 9
Block
1 0 0
/ LBA [LSB]
/ LBA [LSB]
Status read
Partial
block
5 - 19