Datasheet

If bit 13 is set to 1 then the Standby timer is supported as defined by the IDLE command
If bit 13 is set to 0 then the Standby timer operation is defined by the vendor.
Bit 11: IORDY Supported
If bit 11 is set to 1 then this CompactFlash Storage Card supports IORDY operation.
If bit 11 is set to 0 then this CompactFlash Storage Card may support IORDY operation.
Bit 10: IORDY may be disabled
Bit 10 shall be set to 0, indicating that IORDY may not be disabled.
Bit 9: LBA supported
Bit 9 s hall be set to 1, indicating that this CompactFlash Storage Card supports LBA mode addressing. CF
devices shall support LBA addressing.
Bit 8: DMA Supported If bit 8 is set to 1 then Read DMA and Write DMA commands are supported. Bit 8
shall be set to 0. Read/Write DMA commands are not currently permitted on CF cards.

PIO
Data
Transfer
Cycle
Timing
Mode
The PIO transfer timing for each CompactFlash Storage Card falls into modes that have unique
parametric timing specifications. The value returned in Bits 15-8 shall be 00h for mode 0, 01h for mode 1,
or 02h for mode 2. Values 03h through FFh are reserved.

Translation
Parameters
Valid
Bit 0 shall be set to 1 indicating that words 54 to 58 are valid and reflect the current number of cylinders,
heads and sectors. If bit 1 of word 53 is set to 1, the values in words 64 through 70 are v alid. If this bit is
cleared to 0, the values reported in words 64-70 are not valid. Any CompactFlash Storage Card that
supports PIO mode 3 or above shall set bit 1 of word 53 to one and support the fields contained in words
64 through 70.

Current
Number
of
Cylinders,
Heads,
Sectors/Track
These fields contains the current number of user addressable Cylinders, Heads, and Sectors/Track in the
current translation mode.

Current
Capacity
This field contains the product of t he current cylinders times heads times sectors.

Multiple
Sector
Setting
Bits 15-9 are reserved and shall be set t o 0.
Bit 8 shall be set to 1 indicating that the Multiple Sector Setting is valid.
Bits 7-0 are the current setting for the number of sectors that shall be transferred per interrupt on
Read/Write Multiple commands.

Total
Sectors
Addressable
in
LBA
Mode
This field contains the total number of user addressable sectors for the CompactFlash Storage Card in
LBA mode only.

Multiword
DMA
transfer
Bits 15 through 8 of word 63 of the Identify Device parameter information is defined as the Multiword DMA
mode s elected field. If this field is supported, bit 1 of word 53 shall be s et to one. This field is bit significant.
Only one of bits may be set to one in this field by the CompactFlash Storage Card to indicate the multiword
DMA mode which is currently s elected. Of these bits, bits 15 through 11 are res erved. Bit 8, if set to one,
indicates that Multiword DMA mode 0 has been selected. Bit 9, if set to one, indicates that Multiword DMA
mode 1 has been selected. Bit 10, if s et to one, indicates that Multiword DMA mode 2 has been selected.
Selection of Multiword DMA modes 3 and above are specific to CompactFlash are reported in word 163,
Word 163: CF Advanced True IDE Timing Mode Capabilities and Settings.
Bits 7 through 0 of word 63 of the Identify Device parameter information is defined as the Multiword DMA
data transfer supported field. If this field is supported, bit 1 of word 53 shall be set to one. This field is bit
significant. Any number of bits may be set to one in this field by the CompactFlash Storage Card to
indicate the Multiword DMA modes it is capable of supporting.
Of these bits, bits 7 through 2 are reserved. Bit 0, if set to one, indicates that the CompactFlash Storage
Card supports Multiword DMA mode 0. Bit 1, if set to one, indicates that the CompactFlash Storage Card
supports Multiword DMA modes 1 and 0. Bit 2, if set to one, indicates that the CompactFlash Storage