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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.
5.1.19. Set Sleep Mode- 99H, E6H
Bit ->
Command (7)
C/D/H (6)
Cyl High (5)
Cyl Low (4)
Sec Num (3)
Sec Cnt (2)
Feature (1)
This command causes the CompactFlash Memory Card 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.
5.1.20. Standby—96H, E2H
Bit ->
Command (7)
C/D/H (6)
Cyl High (5)
Cyl Low (4)
Sec Num (3)
Sec Cnt (2)
Feature (1)
This command causes the CompactFlash Memory Card to set BSY, enter the Sleep mode (which corresponds to the
ATA "Standby" Mode), clear BSY and return the interrupt immediately. Recovery from sleep mode is accomplished
by simply issuing another command (a reset is not required).
®
CompactFlash
Memory Card Product Manual, Rev. 10.0 © 2002 SANDISK CORPORATION
Table 5-24. Set Sleep Mode
7
6
5
X
Table 5-25. Standby
7
6
5
X
4
3
2
E6H or 99H
Drive
X
X
X
X
X
4
3
2
E2H or 96H
Drive
X
X
X
X
X
ATA Command Description
1
0
X
1
0
X
5-17
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