Transcend TS32GCF133 Datasheet download pdf (Page 61)

133X CompactFlash Card

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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.

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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.

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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.

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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.

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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.

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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

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Transcend TS32GCF133 Datasheet Page 61

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