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IDE Solid State Disk
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 device 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 device supports PIO mode 3.
Bit 1, if set to one, indicates that the device supports PIO mode 4.
Support for PIO modes 5 and above are specific to device are reported in word 163 as described in Word 163:
CF Advanced True IDE Timing Mode Capabilities and Settings.
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 device 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
device 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 66: 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 device 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 device 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 device 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 device that supports PIO mode 3 or above shall support this field, and the value in word 67 shall not be
less than the value reported in word 68.
If bit 1 of word 53 is set to one because a device supports a field in words 64-70 other than this field and the
device does not support this field, the device 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 device
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 device 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 device.
If bit 1 of word 53 is set to one because a device supports a field in words 64-70 other than this field and the
device does not support this field, the device shall return a value of zero in this 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 device 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.
Rev. A.6
14/32
Nov. 2008
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