Datasheet

SLCFxxxM2TU(I)(-x) CompactFlash Card
Datasheet
61000-07000-106, May 2011 57
Command Set
Code
Description
READ VERIFY
SECTOR(S)
40h (w/ retry)
41h (w/o
retry
This command verifies one or more sectors on the CF Card
by transferring data from the flash media to the data buffer in
the CF Card and verifying that the ECC is correct. This
command is identical to the READ SECTOR(S) command,
except that DRQ is never set and no data is transferred to the
host.
RECALIBRATE
1Xh
The CF Card performs only the interface timing and register
operations. When this command is issued, the CF Card sets
BSY and waits for an appropriate length of time, after which it
clears BSY and issues an interrupt. When this command ends
normally, the CF Card is initialized.
REQUEST SENSE
(EXTENDED ERROR)
03h
Command requests extended error code after command ends
with error. Extended error code is returned in Error Register.
SEEK
7Xh
This command is effectively a NOP command to the CF Card
although it does perform a range check.
SET FEATURES
EFh
Command is used by the host to establish or select features.
SET MULTIPLE MODE
C6h
Command enables card to perform multiple read and write
operations and establishes block count for these commands.
SET SLEEP MODE
E6h or 99h
This is the only command that allows the host to set the CF
Card into Sleep mode. When the CF Card is set to sleep
mode, the CF Card clears the BSY line and issues an
interrupt. The CF Card enters sleep mode and the only
method to make the CF Card active again (back to normal
operation) is by performing a hardware reset or a software
reset.
STAND BY
E2h or 96h
This command sets the CF Card in Standby mode. If the
Sector Count Register is a value other than 0H, an Auto
Power Down is enabled and when the CF Card returns to the
Idle mode, the timer starts a countdown. Time is set in Sector
Count Register.
STAND BY IMMEDIATE
E0h or 94h
This command causes the CF Card to set BSY, enter the
Standby mode, clear BSY and return the interrupt
immediately.
WEAR LEVEL /
SECURITY FREEZE
LOCK
F5h
When Security Command Set is not supported: The command
code is effectively a NOP command and only implemented for
backward compatibility. The Sector Count Register is always
returned with a 00h indicating Wear Level is not needed.
When Security Command Set is supported and Security is
enabled or disabled: The command code invokes the
SECURITY FREEZE LOCK command.
WRITE BUFFER
E8h
This command enables the host to overwrite the contents of
the CF Card’s sector buffer with any data pattern desired.
WRITE DMA
CAh
If UDMA is enabled, this command is the sector write
command used for UDMA transfer. If UDMA is not enabled,
this command is the sector write command used for MWDMA
transfer.