User's Manual

T
T
T
S
S
S
3
3
3
2
2
2
M
M
M
~
~
~
1
1
1
G
G
G
C
C
C
F
F
F
8
8
8
0
0
0
80X CompactFlash Card
Transcend Information Inc.
53
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 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.
 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.
Of these bits, bits 7 through 2 are reserved. Bit 0, if set to one, indicates that the CompactFlash Storage Card
supports PIO mode 3. Bit 1, if set to one, indicates that the CompactFlash StorageCard supports PIO mode
4.
Support for PIO modes 5 and above are specific to CompactFlash are reported in word 163.
 Word 65: Minimum Multiword DMA transfer cycle time
Word 65 of the parameter information of the Identify Device command is defined as the minimum Multiword
DMA transfer cycle time. This field defines, in nanoseconds, the minimum cycle time that, if used by the host,
the CompactFlash Storage Card guarantees data integrity during the transfer.
If this field is supported, bit 1 of word 53 shall be set to one. The value in word 65 shall not be less than the
minimum cycle time for the fastest DMA mode supported by the device. This field shall be supported by all
CompactFlash Storage Cards supporting DMA modes 1 and above. If bit 1 of word 53 is set to one, but this
field is not supported, the Card shall return a value of zero in this field.
 Recommended Multiword DMA transfer cycle time
Word 66 of the parameter information of the Identify Device command is defined as the recommended
Multiword DMA transfer cycle time. This field defines, in nanoseconds, the cycle time that, if used by the host,
may optimize the data transfer from by reducing the probability that the CompactFlash Storage Card will
need to negate the DMARQ signal during the transfer of a sector.
If this field is supported, bit 1 of word 53 shall be set to one. The value in word 66 shall not be less than the
value in word 65. This field shall be supported by all CompactFlash Storage Cards supporting DMA modes 1
and above. If bit 1 of word 53 is set to one, but this field is not supported, the Card shall return a value of zero
in this field.
 Word 67: Minimum PIO transfer cycle time without flow control
Word 67 of the parameter information of the Identify Device command is defined as the minimum PIO
transfer without flow control cycle time. This field defines, in nanoseconds, the minimum cycle time that, if
used by the host, the CompactFlash Storage Card guarantees data integrity during the transfer without
utilization of 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 67 shall not