Transcend Information TS32M~1GCF80 - page 54

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80X CompactFlash Card
Transcend Information Inc.
54
be less than the value reported in word 68. If bit 1 of word 53 is set to one because a CompactFlash Storage
Card supports a field in words 64-70 other than this field and the CompactFlash Storage Card does not
support this field, the CompactFlash Storage Card shall return a value of zero in this field.
 Word 68: Minimum PIO transfer cycle time with IORDY
Word 68 of the parameter information of the Identify Device command is defined as the minimum PIO
transfer with IORDY flow control cycle time. This field defines, in nanoseconds, the minimum cycle time that
the CompactFlash Storage Card supports while performing data transfers while utilizing IORDY flow control.
If this field is supported, Bit 1 of word 53 shall be set to one. Any CompactFlash Storage Card that supports
PIO mode 3 or above shall support this field, and the value in word 68 shall be the fastest defined PIO mode
supported by the CompactFlash Storage Card. If bit 1 of word 53 is set to one because a CompactFlash
Storage Card supports a field in words 64-70 other than this field and the CompactFlash Storage Card does
not support this field, the CompactFlash Storage Card shall return a value of zero in t his field.
 Words 82-84: Features/command sets supported
Words 82, 83, and 84 shall indicate features/command sets supported. The value 0000h or FFFFh was
placed in each of these words by CompactFlash Storage Cards prior to ATA-3 and shall be interpreted by the
host as meaning that features/command sets supported are not indicated. Bits 1 through 13 of word 83 and
bits 0 through 13 of word 84 are reserved. Bit 14 of word 83 and word 84 shall be set to one and bit 15 of word
83 and word 84 shall be cleared to zero to provide indication that the features/command sets supported
words are valid. The values in these words should not be depended on by host implementers.
Bit 0 of word 82 shall be set to zero; the SMART feature set is not supported.
If bit 1 of word 82 is set to one, the Security Mode feature set is supported.
Bit 2 of word 82 shall be set to zero; the Removable Media feature set is not supported.
Bit 3 of word 82 shall be set to one; the Power Management feature set is support ed.
Bit 4 of word 82 shall be set to zero; the Packet Command feature set is not supported.
If bit 5 of word 82 is set to one, write cache is supported.
If bit 6 of word 82 is set to one, look-ahead is supported.
Bit 7 of word 82 shall be set to zero; release interrupt is not supported.
Bit 8 of word 82 shall be set to zero; Service interrupt is not supported.
Bit 9 of word 82 shall be set to zero; the Device Reset command is not support ed.
Bit 10 of word 82 shall be set to zero; the Host Protected Area feature set is not supported.
Bit 11 of word 82 is obsolete.
Bit 12 of word 82 shall be set to one; the CompactFlash Storage Card supports the W rite Buffer command.
Bit 13 of word 82 shall be set to one; the CompactFlash Storage Card supports the Read Buffer command.
Bit 14 of word 82 shall be set to one; the CompactFlash Storage Card supports the N OP command.
Bit 15 of word 82 is obsolete.
Bit 0 of word 83 shall be set to zero; the CompactFlash Storage Card does not support the Download
Microcode command.
Bit 1 of word 83 shall be set to zero; the CompactFlash Storage Card does not support the Read DMA
Queued and Write DMA Queued commands.
Bit 2 of word 83 shall be set to one; the CompactFlash Storage Card supports the CFA feature set.
If bit 3 of word 83 is set to one, the CompactFlash Storage Card supports the Advanced Power Management
feature set.
Bit 4 of word 83 shall be set to zero; the CompactFlash Storage Card does not support the Removable Media
Status feature set.
 Words 85-87: Features/command sets enabled
Words 85, 86, and 87 shall indicate features/command sets enabled. The value 0000h or FFFFh was placed
in each of these words by CompactFlash Storage Cards prior to ATA-4 and shall be interpreted by the host
as meaning that features/command sets enabled are not indicated. Bits 1 through 15 of word 86 are reserved.
Bits 0-13 of word 87 are reserved. Bit 14 of word 87 shall be set to one and bit 15 of word 87 shall be cleared
to zero to provide indication that the features/command sets enabled words are valid. The values in thes e
words should not be depended on by host implementers.