FlashDrive Product Manual
FlashDrive Product Manual © 1999 SANDISK CORPORATION
45
6.1.8
Initialize Drive Parameters - 91H
Bit ->
7
6
5
4
3
2
1
0
Command (7)
91H
C / D / H ( 6 )
X
0
X
Drive
Max Head (no. of heads-1)
Cyl High (5)
X
Cyl Low (4)
X
Sec Num (3)
X
Sec Cnt (2)
Number of Sectors
Feature (1)
X
This command enables the host to set the number
of sectors per track and the number of heads per
cylinder. Only the Sector Count and the
Card/Drive/Head registers are used by this
command.
Note:
SanDisk recommends NOT using this command
in any system because DOS determines the
offset to the Boot Record based on the number
of heads and sectors per track. If an FlashDrive
is “formatted” with one head and sector per
track value, the same FlashDrive will not
operate correctly with DOS configured with
another heads and sectors per track value.
6.1.9
Read Buffer - E4H
Bit ->
7
6
5
4
3
2
1
0
Command (7)
E4H
C / D / H ( 6 )
X
Drive
X
Cyl High (5)
X
Cyl Low (4)
X
Sec Num (3)
X
Sec Cnt (2)
X
Feature (1)
X
The Read Buffer command enables the host to
read the current contents of the FlashDrive’s
sector buffer. This command has the same protocol
as the Read Sector(s) command.
Summary of Contents for SD25B-100
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