![](http://datasheet.mmic.net.cn/230000/7P064ATA2003C25_datasheet_15569086/7P064ATA2003C25_40.png)
7PxxxATA20xxC25
June 2000 Rev. 5 – ECO #12935
40
White Electronic Designs Corporation
(508) 366-5151
1. Check Power Mode (code: E5H or 98H): This command checks the power mode.
2. Execute Drive Diagnostic (code: 90H): This command performs the internal diagnostic tests
implemented by the Card.
3. Erase Sector(s) (code: C0H): This command is used to pre-erase and condition data sectors in advance
of a Write without Erase or Write Multiple without Erase command.
4. Format Track (code: 50H): This command writes the desired head and cylinder of the selected drive
but the selected sector data is not exchanged. This card accepts a sector buffer of data from the host to
follow the command with same protocol as the Write Sector Command.
5. Identify Drive (code: ECH): This command enables the host to receive parameter information from the
Card.
Identify Drive Information
Word address Default value
Total bytes
Data field type information
0
848AH
2
General configuration bit-significant information
1
XXXX
2
Default number of cylinders
2
0000H
2
Reserved
3
00XXH
2
Default number of heads
4
0000H
2
Number of unformatted bytes per track
5
XXXX
2
Number of unformatted bytes per sector
6
XXXX
2
Default number of sectors per track
7 to 8
XXXX
4
Number of sectors per card (Word7 = MSW, Word8 = LSW)
9
0000H
2
Reserved
10 to 19
XXXX
20
Reserved
20
0002H
2
Buffer type (dual ported)
21
0002H
2
Buffer size in 512 byte increments
22
0004H
2
# of ECC bytes passed on Read/Write Long Commands
23 to 46
XXXX
48
Firmware revision in ASCII etc.
47
0001H
2
Maximum of 1 sector on Read/Write Multiple command
48
0000H
2
Double Word not supported
49
0200H
2
Capabilities: DMA NOT Supported (bit 8), LBA supported
(bit9)
50
0000H
2
Reserved
51
0100H
2
PIO data transfer cycle timing mode 1
52
0000H
2
DMA data transfer cycle timing mode not Supported
53 to 58
XXXX
12
Reserved
59
010XH
2
Multiple sector setting is valid
60 to 61
XXXX
4
Total number of sectors addressable in LBA Mode
62 to 255
0000H
388
Reserved