ST1.2 Series Product Manual, Rev. B
31
4.1.3
Identify Device command
The Identify Device command (command code EC
H
) transfers information about the drive to the host following
power up. The data is organized as a single 512-byte block of data, whose contents are shown in the table on
page 31. All reserved bits or words should be set to zero. Parameters listed with an “x” are drive-specific or
vary with the state of the drive. See Section 2.0 on page 3 for default parameter settings.
The following commands contain drive-specific features that may not be included in the
Draft ATA-7 Standard.
Word
ATA specification
CF specification
Value
Value
Value
CF Mem/IO
CF TruIDE
FX (Flex)
0
Configuration information:
• Bit 15: 0 = ATA; 1 =
ATAPI
• Bit 7: removable media
• Bit 6: removable control-
ler
• Bit 0: reserved
General Config
848A
H
848A
H
0C5A
H
1
Obsolete
Default number of
cylinders
16,383
16,383
16,383
2
Special Config
Reserved
0000
H
0000
H
0000
H
3
Obsolete
Default number of heads
16
16
16
4
Retired
Number of unformatted
bytes/track (Obsolete)
0000
H
0000
H
0000
H
5
Retired
Number of unformatted
bytes/sector (Obsolete)
0000
H
0000
H
0000
H
6
Obsolete
Default number of
sectors/track
003F
H
003F
H
003F
H
7
Reserved for CF Spec
Number of sectors per
card (MSW)
xxxx xxxx
H
xxxx xxxx
H
xxxx xxxx
H
8
Reserved for CF Spec
Number of sectors per
card (LSW)
9
Retired
Obsolete
0000
H
0000
H
0000
H
10–19
Serial number:
(20 ASCII characters,
0000
H
= none)
Serial number:
(Right justified)
ASCII
ASCII
ASCII
20
Retired
Obsolete
0000
H
0000
H
0000
H
21
Retired
Obsolete
0000
H
0000
H
0000
H
22
Obsolete
Number of ECC bytes
0004
H
0004
H
0004
H
23–26
Firmware revision
(8 ASCII character string,
padded with blanks to end
of string)
Firmware revision
x.xx
x.xx
x.xx
27–46
Drive model number:
(40 ASCII characters,
padded with blanks to end
of string)
Drive model number (left
justified) big endian byte
order in word
ST68022CF
ST66022CF
ST64022CF
ST68022CF
ST66022CF
ST64022CF
ST68022FX
ST66022FX
ST64022FX
Summary of Contents for ST64022CF
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