
Interface
Table 5.25 Information to be read by IDENTIFY DEVICE command (3/3)
Word | Value | Description |
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X ' 0100 ' | Number of words for logical sectors |
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X ' 0000 ' | Reserved |
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128 | X’0xxx’ | Security status | *23 |
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X’xxxx’ | Undefined |
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X’0000’ | Reserved |
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255 | X’xxA5’ | Check sum (The 2 complement of the lower order byte resulting from | |
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| summing bits 7 to 0 of word 0 to 254 and word 255, in byte units.) |
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*1 Word 0: General configuration
Bit 15: ATA device = 0, ATAPI device = 1
Bits
Bit 7: Removable disk drive = 1
Bit 6: Fixed drive = 1
Bits
Bit 2: | IDENTIFY DEVICE Valid = 0 |
Bits
*2 Word 1, 3, 6,
Word | MHV2100BH | MHV2080BH |
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1 | X ' 3FFF ' | X ' 3FFF ' |
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3 | X' 10 ' | X ' 10 ' |
6X ' 3F ' X ' 3F '
MHV2060BH
X ' 3FFF '
X ' 10 '
X ' 3F '
X ' 6FC7C80 '
MHV2040BH
X ' 3FFF '
X ' 10 '
X ' 3F '
X '4A85300 '
*3 Status of the Word 2 Identify information is shown as follows:
37C8h The device requires the SET FEATURES
738Ch The device requires the SET FEATURES