Product manual

Preliminary CompactFlash Memory Card Product Manual
SanDisk CompactFlash Memory Card Product Manual Rev. 8 © 2001 SANDISK CORPORATION
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6.1.25 Write Long Sector - 32H, 33H
Bit -> 7 6 5 4 3 2 1 0
Command (7)
32H or 33H
C/D/H (6)
1 LBA 1 Drive Head (LBA 27-24)
Cyl High (5)
Cylinder High (LBA 23-16)
Cyl Low (4)
Cylinder Low (LBA 15-8)
Sec Num (3)
Sector Number (LBA 7-0)
Sec Cnt (2)
X
Feature (1)
X
This command is provided for compatibility
purposes and is similar to the Write Sector(s)
command except that it writes 516 bytes instead of
512 bytes. Only single sector Write Long
operations are supported. The transfer consists of
512 bytes of data transferred in word mode
followed by 4 bytes of ECC transferred in byte
mode. Because of the unique nature of the solid-
state CompactFlash Memory Card, the four bytes
of ECC transferred by the host cannot be used by
the CompactFlash Card. The CompactFlash Card
discards these four bytes and writes the sector with
valid ECC fields. This command has the same
protocol as the Write Sector(s) command.
6.1.26 Write Multiple Command - C5H
Bit -> 7 6 5 4 3 2 1 0
Command (7)
C5H
C/D/H (6)
X LBA X Drive Head
Cyl High (5)
Cylinder High
Cyl Low (4)
Cylinder Low
Sec Num (3)
Sector Number
Sec Cnt (2)
Sector Count
Feature (1)
X
Note: The current revision of the CompactFlash Memory
Card only supports a block count of 1 as indicated in
the Identify Drive Command information. This
command is provided for compatibility with future
products which may support a larger block count.
This command is similar to the Write Sectors
command. The CompactFlash Memory Card sets
BSY within 400 nsec of accepting the command.
Interrupts are not presented on each sector but on
the transfer of a block which contains the number
of sectors defined by Set Multiple. Command
execution is identical to the Write Sectors operation
except that the number of sectors defined by the
Set Multiple command is transferred without
intervening interrupts.
DRQ qualification of the transfer is required only
at the start of the data block, not on each sector.
The block count of sectors to be transferred
without intervening interrupts is programmed by
the Set Multiple Mode command, which must be
executed prior to the Write Multiple command.
When the Write Multiple command is issued, the
Sector Count Register contains the number of