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266X CompactFlash Card
Transcend Information Inc.
60
¾
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 valid. 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.
¾ 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.
¾ Current Capacity
This field contains the product of the current cylinders times heads times sectors.
¾ Multiple Sector Setting
Bits 15-9 are reserved and shall be set to 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.
¾ 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.
¾ Multiword DMA transfer
Bits 15 through 8 of word 63 of the Identify Device parameter information is defined as the Multiword DMA
mode selected field. If this field is supported, bit 1 of word 53 shall be set 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 selected. Of these bits, bits 15 through 11 are reserved. 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 set 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
Card supports Multiword DMA modes 2, 1 and 0. Support for 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.
¾ Word 64: Advanced PIO transfer modes supported
Bits 7 through 0 of word 64 of the Identify Device parameter information is defined as the advanced PIO
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 advanced PIO modes it is capable of supporting.