
Host Interface
4.5.4 CHECK POWER MODE (E5h)
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| Table 4.22 CHECK POWER MODE command |
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| 7 | 6 | 5 | 4 |
| 3 | 2 | 1 | 0 |
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CM | 1 | 1 | 1 | 0 | 0 | 1 | 0 | 1 | |
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DH | X | X | X | DRV |
| X | X | X | X |
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CH | X | X | X | X |
| X | X | X | X |
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CL | X | X | X | X |
| X | X | X | X |
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SN | X | X | X | X |
| X | X | X | X |
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SC | X | X | X | X |
| X | X | X | X |
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FR | X | X | X | X |
| X | X | X | X |
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The CHECK POWER MODE command sets the ODD power mode status in the SC register, then notifies the host of the value in Table 4.23. When the drive is in sleep mode, the interface is inactive and the ODD cannot receive this command.
Table 4.23 Power mode indication
Power mode status | SC register |
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Standby mode | 00h |
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Entering standby mode | 00h |
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Returning from standby mode | 00h |
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Idle mode | FFh |
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Active mode | FFh |
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