K6602705
Rev.3
08.20.01
- 38 -
6.3.2.3.1 Identify Device [ECh]
The Identify Device command enables the host to receive parameter information from the device.
When the command is issued, the device sets BSY, stores the required parameter information in the
sector buffer, sets DRQ, and generates an interrupt. The host then reads the information from the
sector buffer through the Data Register. The parameter words are defined in Table 6.5 and 6.6.
All reserved bits or words shall be zero.
Table 6.5 Identify Device Information
Word
Description
Value
(HEX.)
0
General configuration
045Ah
1
Number of logical cylinders
See table 6.6
2
Specific configuration
C837h
3
Number of logical heads
See table 6.6
4 - 5
Retied
0000h
6
Number of logical sectors per logical track
See table 6.6
7-9
Vendor specific
10-19 Serial number (20 ASCII characters)
20
Buffer type
0000h = Not specified
0001h = Single port single buffer
0002h = Dual port multi-sector buffer
0003h = Dual port multi-sector buffer with read caching capability
0003h
21
Buffer size in 512 byte increments (0000h=not specified)
DK23DA-20F/
10F: 0400h
DK23DA-40F/
30F: 1000h
22
Number of ECC bytes passed on READ/WRITE LONG commands
0004h
23-26 Firmware revision(8 ASCII Characters)
27-46 Model number(40 ASCII Characters)
DK23DA-40F: “HITACHI_DK23DA-40”
DK23DA-30F: “HITACHI_DK23DA-30”
DK23DA-20F: “HITACHI_DK23DA-20”
DK23DA-10F: “HITACHI_DK23DA-10”
47
Number of sectors on multiple commands
Bit 15 - 8 80h (fixed)
Bit 7 - 0 Number of sectors on multiple command
8010h
48
Double word I/O not supported
0000h = cannot perform double word I/O
0001h = can perform double word I/O
0000h
49
Capabilities
Bit 15 – 14 0 = Reserved
Bit 13 1 = Standby timer values as specified in ATA-2
specification supported
Bit 12 0 = Reserved
Bit 11 1 = IORDY supported
Bit 10 1 = IORDY can be disabled
Bit 9 1 = LBA supported
Bit 8 1 = DMA supported
Bit 7 – 0 Vendor Specific
0B00h
