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4.6 Packet Commands
C156-E227-01EN 4-65
4.6.9 READ (10) command
Table 4.81 READ (10) command
Bit
Byte
76543210
0 Operation Code (28h)
1 Logical Unit Number Reserved
2-5 Logical Block Address
6Reserved
7-8 Transfer Length
9-11 Reserved
The READ (10) command reads data for the specified number of blocks from the
specified logical block address and transfers it.
Logical Block Address specifies the head logical block address used to start
reading.
Transfer Length specifies the number of blocks to be read and transferred.
When Transfer Length is 0, the command does not carry out data transfer. It
simply ends normally without reading any data.
4.6.10 READ (12) command
Table 4.82 READ command
Bit
Byte
76543210
0 Operation Code (A8h)
1 Logical Unit Number Reserved
2-5 Logical Block Address
6-9 Transfer Length
10-11 Reserved
This command reads data for the specified number of blocks beginning from the
specified logical block address and transfers the data.
Logical Block Address indicates the first logical block address from which reading
starts.
Transfer Length indicates the number of blocks to transfer and read.