User guide

900S Series Industrial Grade CFast Product Manual v2.0Cactus Technologies
®
17
5.1.1. Identify Drive-ECH
The Identify Drive command enables the host to receive parameter information from the drive.
This command has the same protocol as the Read Sector(s) command. The parameter words in the
buer have the arrangement and meanings dened in Table 5-7. All reserved bits or words are zero.
Table 5-7 is the denition for each eld in the Identify Drive Information.
Table 5-7. Identify Drive Information
Word
Address
Default
Value
Total
Bytes
Data Field Type Information
0 045AH 2 General conguration bit-signicant information.
1 XXXXH 2 Default number of cylinders; capacity dependent.
2 0000H 2 Reserved.
3 00XXH 2 Default number of heads; capacity dependent.
4 0000H 2 Number of unformatted bytes per track.
5 0200H 2 Number of unformatted bytes per sector.
6 XXXXH 2 Default number of sectors per track; capacity dependent.
7-8 XXXXH,XXXXH 4
Number of sectors per drive (Word 7 = MSW, Word 8 = LSW);
capacity dependent.
9 0000H 2 Reserved.
10-19 aaaa 20 Serial number in ASCII (Right Justied).
20 0002H 2 Buer type (dual ported multi-sector)
21 0001H 2 Buer size in 512 bytes increments
22 0004H 2 # of ECC bytes passed in R/W 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 Justied) Big Endian Byte Order in
Word.
47 8001H 2
Maximum number of sectors on Read/Write Multiple command:
1
48 0000H 2 Double Word not supported.
49 0F00H 2 Capabilities: DMA, LBA, IORDY supported
50 4001H 2 Capabilities: device specic standby timer minimum
51 0200H 2 PIO data transfer cycle timing mode 2
52 0000H 2
Single Word DMA data transfer cycle timing mode (not support-
ed).
53 0007H 2 Data elds 54-58,64-70 and 88 are valid.
54 XXXX 2 Current numbers of cylinders.
55 XXXX 2 Current numbers of heads.
56 XXXX 2 Current sectors per track.
57-58 XXXX 4
Current capacity in sectors (LBAs) (Word 57 = LSW, Word 58 =
MSW).
59 010XH 2 Multiple sector setting is valid; low byte is capacity dependent.
60-61 XXXX 4 Total number of sectors addressable in LBA Mode.
62 0000H 2 Single Word DMA transfer not implemented
63 0X07H 2
Multiword DMA modes 0-2 are supported; upper byte reects
currently selected MWDMA mode.