
SanDisk CompactFlash Card OEM Product Manual
ATA Command Description
5.1.5
Identify Device–ECH
The Identify Drive command enables the host to receive parameter information from a
CompactFlash Memory 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 5-8. All reserved bits or words are “0”.
Table 5-7
Identify Device
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
Table 5-8 is the definition for each field in the Identify Device Information.
Table 5-8
Identify Device Information
Word
Address
Default Value
Total Bytes
Data Field Type Information
0
848Ah
2
General configuration bit-significant
information
1
XXXXh
2
Default number of cylinders
2
0000h
2
Reserved
3
XXXXh
2
Default number of heads
4
0000h
2
Number of unformatted bytes per track
5
0000h
2
Number of unformatted bytes per sector
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
0000h
2
Reserved
10-19
aaaa
20
Serial number in ASCII (right justified)
20
0000h
2
Buffer type (dual ported)
21
0000h
2
Buffer size in 512 byte increments
22
0004h
2
Number of ECC bytes passed on Read/Write
Long Commands
23-26
aaa
8
Firmware revision in ASCII (Rev M.ms) set by
code Big Endian Byte Order in Word
27-46
aaaa
40
Model number in ASCII (left justified) Big
Endian Byte Order in Word
47
000Xh
2
Maximum
No. of Sectors on Read/Write Multiple
command
48
0000h
2
Double-word not supported
49
0X00h
a
2
Capabilities: DMA Supported (bit 8), LBA
supported (bit 9)
50
0000h
2
Reserved
© 2007 SanDisk Corporation
5-5
Rev. 12.0, 02/07
Содержание 20-10-00038
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