SDP3B FlashDisk Product Manual
SanDisk SDP3B FlashDisk Product Manual © 1998 SANDISK CORPORATION72
6.1.18 Set Multiple Mode - C6H
Bit -> 7 6 5 4 3 2 1 0
Command (7) C6H
C/D/H (6) X Drive X
Cyl High (5) X
Cyl Low (4) X
Sec Num (3) X
Sec Cnt (2) Sector Count
Feature (1) X
This command enables the SDP3B FlashDisk to
perform Read and Write Multiple operations and
establishes the block count for these commands.
The Sector Count Register is loaded with the
number of sectors per block. The current version of
the SDP3B FlashDisk supports only a block size of
1 sector per block. Future versions may support
larger block sizes. Upon receipt of the command,
the SDP3B FlashDisk sets BSY to 1 and checks
the Sector Count Register.
If the Sector Count Register contains a valid value
and the block count is supported, the value is
loaded for all subsequent Read Multiple and
Write Multiple commands and execution of those
commands is enabled. If a block count is not
supported, an Aborted Command error is posted,
and Read Multiple and Write Multiple commands
are disabled. If the Sector Count Register contains
0 when the command is issued, Read and Write
Multiple commands are disabled. At power on, or
after a hardware or (unless disabled by a Set
Feature command) software reset, the default
mode is Read and Write Multiple disabled.
6.1.19 Set Sleep Mode- 99H,E6H
Bit -> 7 6 5 4 3 2 1 0
Command (7) E6H or 99H
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
This command causes the SDP3B FlashDisk to set
BSY, enter the Sleep mode, clear BSY and
generate an interrupt. Recovery from sleep mode is
accomplished by simply issuing another command
(a reset is permitted but not required). Sleep mode
is also entered when internal timers expire so the
host does not need to issue this command except
when it wishes to enter Sleep mode immediately.
The default value for the read to sleep timer is 5
milliseconds. Note that this time base (5 msec) is
different from the ATA Specification.
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