SDP3B FlashDisk Product Manual
SanDisk SDP3B FlashDisk Product Manual © 1998 SANDISK CORPORATION76
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 SDP3B FlashDisk, the four bytes of ECC
transferred by the host cannot be used by the
SDP3B FlashDisk. The SDP3B FlashDisk
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 SDP3B FlashDisk
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 SDP3B FlashDisk 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.
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