Product manual

ATA Command Description SanDisk CompactFlash Card OEM Product Manual

Table 5-1 Primary and Secondary I/O Decoding

Class Command Code FR SC SN CY DH LBA

1 Set Multiple Mode C6h - Y - - D -

1 Set Sleep Mode E6h or 99h - - - - D -

1 Stand By E2h or 96h - - - - D -

1 Stand By Immediate E0h or 94h - - - - D -

Translate Sector

87h - Y Y Y Y Y

Wear Level

F5h - - - - Y -

2 Write Buffer E8h - - - - D -

2 Write DMA CA or CB - Y Y Y Y Y

2 Write Long Sector 32h or 33h - - Y Y Y Y

3 Write Multiple C5h - Y Y Y Y Y

Write Multiple w/o Erase

CDh -Y Y Y Y Y

2 Write Sector(s) 30h or 31h - Y Y Y Y Y

Write Sector(s) w/o Erase

38h - Y Y Y Y Y

2 Write Verify 3Ch - Y Y Y Y Y

a. These commands are not standard PC Card ATA commands and these features are no longer sup-

ported with the introduction of 256 Mbit Flash Technology. If one of these commands is issued, the

sectors will be erased but there will be no net gain in write performance when using the Write Without

Erase command.

b. These commands are not standard PC Card ATA commands but provide additional functionality.

ABBREVIATION KEY

FR Features Register

SC Sector Count Register

SN Sector Number Register

CY Cylinder Registers

DH Card/Drive/Head Register

LBA Logical Block Address Mode Supported

Y The register contains a valid parameter for this command. For the Drive/Head Register, both the

CompactFlash Card and head parameters are used

D The register contains a valid parameter for this command. For the Drive/Head Register, only the

CompactFlash Card parameter is valid and not the head parameter

5.1.1 Check Power Mode–98H, E5H

This command checks the power mode.

If the CompactFlash Card is in, going to, or recovering from the sleep mode, it sets BSY, sets

the Sector Count Register to 00h, clears BSY and generates an interrupt.