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T
S
3
2
M
~
1
G
C
F
T
S
3
2
M
~
1
G
C
F
T
S
3
2
M
~
1
G
C
F
5.6.6 Identify Device – Ech
Bit ->
Command (7)
C/D/H (6)
Cyl High (5)
Cyl Low (4)
Sec Num (3)
Sec Cnt (2)
Feature (1)
The Identify Device command enables the host to receive parameter information from the CompactFlash
Storage Card. This command has the same protocol as the Read Sector(s) command. The parameter words
in the buffer have the arrangement and meanings defined in Table as below. All reserved bits or words are
zero. Hosts should not depend on Obsolete words in Identify Device containing 0. Table specifies each field in
the data returned by the Identify Device Command. In Table as below, X indicates a numeric nibble value
specific to the card and aaaa indicates an ASCII string specific to the particular drive.
Word
Default
Address
848Ah
0
1
XXXXh
2
3
00XXh
4
5
6
XXXXh
7-8
XXXXh
9
XXXXh
10-19
20
21
22
23-26
27-46
47
XXXXh
48
49
XX00h
50
Transcend Information Inc.
8
0
8
0
8
0
7
6
X
X
Total
Value
Bytes
2
General configuration - signature for the CompactFlash 0 lash Storage Card
0XXX
2
General configuration – Bit Significant with ATA-4 definitions.
2
Default number of cylinders
0000h
2
Reserved
2
Default number of heads
0000h
2
Obsolete
0000h
2
Obsolete
2
Default number of sectors per track
4
Number of sectors per card (Word 7 = MSW, Word 8 = LSW)
2
Obsolete
aaaa
20
Serial number in ASCII (Right Justified)
0000h
2
Obsolete
0000h
2
Obsolete
0004h
2
Number of ECC bytes passed on Read/Write Long Commands
aaaa
8
Firmware revision in ASCII. Big Endian Byte Order in Word
aaaa
40
Model number in ASCII (Left Justified) Big Endian Byte Order in Word
2
Maximum number of sectors on Read/Write Multiple command
0000h
2
Reserved
2
Capabilities
0000h
2
Reserved
5
4
3
ECh
X
Drive
X
X
X
X
X
Data Field Type Information
49
80X CompactFlash Card
2
1
0
X
V 1 . 1
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