Compact Flash Card Specification Sheet

266X CompactFlash Card

Transcend Information Inc.

¾ Word 1: Default Number of Cylinders

This field contains the number of translated cylinders in the default translation mode. This value will be the

same as the number of cylinders.

¾ Word 3: Default Number of Heads

This field contains the number of translated heads in the default translation mode.

¾ Word 6: Default Number of Sectors per Track

This field contains the number of sectors per track in the default translation mode.

¾ Words 7-8: Number of Sectors per Card

This field contains the number of sectors per CompactFlash Storage Card. This double word

value is also the first invalid address in LBA translation mode.

¾ Words 10-19: Serial Number

This field contains the serial number for this CompactFlash Storage Card and is right justified and padded

with spaces (20h).

¾ Word 22: ECC Count

This field defines the number of ECC bytes used on each sector in the Read and Write Long commands.

This value shall be set to 0004h.

¾ Words 23-26: Firmware Revision

This field contains the revision of the firmware for this product.

¾ Words 27-46: Model Number

This field contains the model number for this product and is left justified and padded with spaces (20h).

¾ Word 47: Read/Write Multiple Sector Count

Bits 15-8 shall be the recommended value of 80h or the permitted value of 00h. Bits 7-0 of this word define

the maximum number of sectors per block that the CompactFlash Storage Card supports for Read/Write

Multiple commands.

¾ Word 49: Capabilities

Bit 13: Standby Timer

If bit 13 is set to 1 then the Standby timer is supported as defined by the IDLE command

If bit 13 is set to 0 then the Standby timer operation is defined by the vendor.

Bit 11: IORDY Supported

If bit 11 is set to 1 then this CompactFlash Storage Card supports IORDY operation.

If bit 11 is set to 0 then this CompactFlash Storage Card may support IORDY operation.

Bit 10: IORDY may be disabled

Bit 10 shall be set to 0, indicating that IORDY may not be disabled.

Bit 9: LBA supported

Bit 9 shall be set to 1, indicating that this CompactFlash Storage Card supports LBA mode addressing.

CF devices shall support LBA addressing.

Bit 8: DMA Supported If bit 8 is set to 1 then Read DMA and Write DMA commands are supported. Bit 8

shall be set to 0. Read/Write DMA commands are not currently permitted on CF cards.

¾ PIO Data Transfer Cycle Timing Mode

The PIO transfer timing for each CompactFlash Storage Card falls into modes that have unique

parametric timing specifications. The value returned in Bits 15-8 shall be 00h for mode 0, 01h for mode 1,

or 02h for mode 2. Values 03h through FFh are reserved.