SanDisk CompactFlash Extreme III User Manual
Page 59
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