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CompactFlash Memory Card Product Manual Preliminary

6.1.5.14 Word 47: Read/Write Multiple Sector Count

This field contains the maximum number of sectors that

can be read or written per interrupt using the Read

Multiple or Write Multiple commands.

6.1.5.15 Word 48: Double Word Support

This field indicates this product will not support double

word transfers.

6.1.5.16 Word 49: Capabilities

This field indicates this product will not support DMA

Data transfers but does support LBA mode.

6.1.5.17 Word 51: PIO Data Transfer Cycle Timing

Mode

This field defines the mode for PIO data transfer.

6.1.5.18 Word 52: DMA Data Transfer Cycle Timing

Mode

This field states this product doesn’t support any DMA

data transfer mode.

6.1.5.19 Word 53: Translation Parameters Valid

Bit 0 of this field is set, indicating that words 54 to 58

are valid and reflect the current number of cylinders,

heads and sectors. Bit 1 is also set, indicating values in

words 64 through 70 are valid.

6.1.5.20 Words 54-56: 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.

6.1.5.21 Words 57- 58: Current Capacity

This field contains the product of the current cylinders

times heads times sectors.

6.1.5.22 Word 59: Multiple Sector Setting

This field contains a validity flag in the odd byte

and the current number of sectors that can be

transferred per interrupt for R/W Multiple in the

even byte. The odd byte is always 01H which

indicates that the even byte is always valid.

The even byte value depends on the value set by the Set

Multiple command. The even byte of this word by

default contains a 00H which indicates that R/W

Multiple commands are not valid. The only other value

returned by the CompactFlash Memory Card in the even

byte is a 01H value which indicates that 1 sector per

interrupt can be transferred in R/W Multiple mode.

6.1.5.23 Words 60-61: Total Sectors Addressable in

LBA Mode

This field contains the number of sectors addressable for

the CompactFlash Memory Card in LBA mode only.

6.1.5.24 Word 64: Advanced PIO Transfer Modes

Supported

Bits 0 and 1 of this field are set to indicate support for

PIO transfer modes 3 and 4, respectively.

6.1.5.25 Word 67: Minimum PIO Transfer Cycle

Time Without Flow Control

This field indicates in nanoseconds, the minimum cycle

time that, if used by the host, the CompactFlash

Memory Card guarantees data integrity during the cycle

without utilization of flow control.

6.1.5.26 Word 68: Minimum PIO Transfer Cycle

Time With Flow Control

This field indicates in nanoseconds, the minimum cycle

time the CompactFlash Memory Card supports while

performing data transfers using flow control.