5.3 Host Commands
final partial block is transferred. The number of sectors in the partial block to be transferred is n where n = remainder of (“number of sectors”/”block count”).
If the READ MULTIPLE command is issued before the SET MULTIPLE MODE command is executed or when the READ MULTIPLE command is disabled, the device rejects the READ MULTIPLE command with an ABORTED COMMAND error.
Figure 5.2 shows an example of the execution of the READ MULTIPLE command.
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Block count specified by SET MULTIPLE MODE command = 4 (number of sectors in a block)
READ MULTIPLE command specifies;
Number of requested sectors = 9 (Sector Count register = 9)
Figure 5.2 Execution example of READ MULTIPLE command
At command issuance (I/O registers setting contents)
1F7H(CM) | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 0 |
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1F6H(DH) | x | L | x | DV | Start head No. / LBA |
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1F5H(CH) | Start cylinder No. [MSB] / LBA |
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1F4H(CL) | Start cylinder No. [LSB] / LBA |
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1F3H(SN) | Start sector No. / LBA [LSB] |
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1F2H(SC) | Transfer sector count |
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1F1H(FR) | xx |
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