ATA20 White Electronic Designs Corporation, ATA20 Datasheet - Page 40

• Manufacturer Part Number: ATA20
• Description: Density = 8MB-160MB ;; Memory Device = Hitachi Flash ;; Organization = X16/x8 ;; Speed (ns) = 250 ;; Volt = 3/5
• Manufacturer: White Electronic Designs Corporation

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