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Table 20: Format track
Task File Register
7
6
5
4
3
2
1
0
COMMAND
50h
DRIVE/HEAD
nu
L
nu
D
H[3:0] or LBA[27:24] of the starting
sector/LBA
CYLINDER HI
CYLINDER LOW
SECTOR NUM
SECTOR COUNT
FEATURES
Cylinder[15:8] or LBA[23:16] of the first sector/LBA
Cylinder[7:0] or LBA[15:8] of the first sector/LBA
nu
Sector Count (LBA only)
nu
6.7 Identify Device (ECh)
The Identify Device command enables the host to receive parameter information from the Drive. This command
has the same protocol as the Read Sector(s) command. Table 21 defines the Identify Device command Byte
sequence. All reserved bits or Words are zero.
Table 21: Identify Device
Task File Register
7
6
5
4
3
2
1
0
COMMAND
ECh
DRIVE/HEAD
nu
nu
nu
D
nu
CYLINDER HI
CYLINDER LOW
SECTOR NUM
SECTOR COUNT
FEATURES
Table 22: Identify Device Information
nu
nu
nu
nu
nu
Word
Address
0
1
2
3
4
5
6
7-8
9
10-19
20
21
22
23-26
27-46
47
48
49
50
51
52
53
54
55
56
57-58
59
60-61
62
Default
Value
045Ah*
XXXXh
0000h
00XXh
0000h
0200h
XXXXh
XXXXh
0000h
aaaa
0002h
0001h
0004h
YYYY*
YYYY*
8001h
0000h
0F00h*
4001h
0200h
0000h
0007h
XXXXh
XXXXh
XXXXh
XXXXh
010Xh*
XXXXh
0000h
Total
Bytes
2
2
2
2
2
2
2
4
2
20
2
2
2
8
40
2
2
2
2
2
2
2
2
2
2
4
2
4
2
Data Field Type Information
Standard Configuration FIX (optional 848Ah for removable)
Default number of cylinders (obsolete)
Reserved
Default number of heads (obsolete)
Obsolete
Obsolete
Default number of sectors per track (obsolete)
Number of sectors per Drive (Word 7 = MSW, Word 8 = LSW)
Obsolete
Serial number in ASCII (right justified)
Buffer type (dual ported multi-sector) retired
Buffer Size in 512byte increment (obsolete)
Reserved
Firmware revision in ASCII. Big Endian Byte Order in Word
Model number in ASCII (right justified (“SF CAxxxxHxBVxxx-x-xx-xxx-xxx”)
Maximum number of sectors on Read/Write Multiple command
Double word not supported
Capabilities with DMA, LBA, IORDY supported
Capabilities
PIO data transfer cycle timing mode 2
Obsolete
Field validity (Bytes 54-58, 64-70, 88)
Current numbers of cylinders (obsolete)
Current numbers of heads (obsolete)
Current sectors per track (obsolete)
Current capacity in sectors (LBAs)(Word 57 = LSW, Word 58 = MSW) (obsolete)
Multiple sector setting (can be changed by host).
Total number of sectors addressable in LBA Mode
Single Word DMA transfer not implemented
Swissbit AG
Industriestrasse 4
Swissbit reserves the right to change products or specifications without notice.
Revision: 0.92
CH-9552 Bronschhofen
Switzerland
F-240_data_sheet_CA-HxBV_Rev092.doc
Page 18 of 56
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