5K320 SATA OEM Specification
14.18Read Multiple (C4h)
Command Block Output Registers |
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Register | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | Register | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
Data | - | - | - | - | - | - | - | - | Data | - | - | - | - | - | - | - | - |
Feature | - | - | - | - | - | - | - | - | Error |
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Sector Count | V V V V V V V V | Sector Count | V V V V V V | V V | |||||||||||||
LBA Low | V V V V V V V V | LBA Low | V V V V V V | V V | |||||||||||||
LBA Mid | V V V V V V V V | LBA Mid | V V V V V V | V V | |||||||||||||
LBA High | V V V V V V V V | LBA High | V V V V V V | V V | |||||||||||||
Device | - | L | - | - H H H H | Device | - | - | - | - | H | H | H | H | ||||
Command | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | Status |
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Error Register
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
CRC | UNC | 0 | IDN | 0 | ABT | T0N | AM |
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0 | V | 0 | V | 0 | V | 0 | 0 |
Table 84 Read Multiple Command (C4h)
Status Register
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
BSY | RDY | DF | DSC | DRQ | COR | IDX | ERR |
0 | V | 0 | V | - | 0 | 0 | V |
The Read Multiple command reads one or more sectors of data from disk media, then transfers the data from the device to the host.
The sectors are transferred through the Data Register 16 bits at a time. Command execution is identical to the Read Sectors command except that an interrupt is generated for each block (as defined by the Set Multiple command) instead of for each sector.
Output Parameters To The Device
Sector CountThe number of continuous sectors to be transferred. If zero is specified, then 256 sectors will be transferred.
The sector number of the first sector to be transferred. (L=0) In LBA mode, this register contains LBA bits 0 - 7. (L=1) The cylinder number of the first sector to be transferred. (L=0)
In LBA mode, this register contains LBA bits 8 - 15 (Mid), 16 - 23 (High). (L=1) The head number of the first sector to be transferred. (L=0)
In LBA mode, this register contains LBA bits 24 - 27. (L=1)
Input Parameters From The Device
Sector CountThe number of requested sectors not transferred. This will be zero, unless an unrecoverable error occurs.
The sector number of the last transferred sector. (L=0)
In LBA mode, this register contains current LBA bits 0 - 7. (L=1) The cylinder number of the last transferred sector. (L=0)
In LBA mode, this register contains current LBA bits
LBA mode, this register contains current LBA bits 24 - 27. (L=1)
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