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T
T
T
S
S
S
3
3
3
2
2
2
M
M
M
~
~
~
1
1
1
G
G
G
C
C
C
F
F
F
8
8
8
0
0
0
80X CompactFlash Card
Transcend Information Inc.
49
5.6.6 Identify Device – Ech
Bit ->
7
6
5
4
3
2
1
0
Command (7)
ECh
C/D/H (6)
X X X Drive
X
Cyl High (5)
X
Cyl Low (4)
X
Sec Num (3)
X
Sec Cnt (2)
X
Feature (1)
X
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
Address
Default
Value
Total
Bytes
Data Field Type Information
848Ah 2 General configuration - signature for the CompactFlash 0 lash Storage Card
0
0XXX 2 General configuration – Bit Significant with ATA-4 definitions.
1 XXXXh 2 Default number of cylinders
2 0000h 2 Reserved
3 00XXh 2 Default number of heads
4 0000h 2 Obsolete
5 0000h 2 Obsolete
6 XXXXh
2 Default number of sectors per track
7-8 XXXXh
4 Number of sectors per card (Word 7 = MSW, Word 8 = LSW)
9 XXXXh
2 Obsolete
10-19 aaaa 20 Serial number in ASCII (Right Justified)
20 0000h 2 Obsolete
21 0000h 2 Obsolete
22 0004h 2 Number of ECC bytes passed on Read/Write Long Commands
23-26 aaaa 8 Firmware revision in ASCII. Big Endian Byte Order in Word
27-46 aaaa 40 Model number in ASCII (Left Justified) Big Endian Byte Order in Word
47 XXXXh
2 Maximum number of sectors on Read/Write Multiple command
48 0000h 2 Reserved
49 XX00h 2 Capabilities
50 0000h 2 Reserved