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参数资料
| 型号： | SFCA16GBH2BV4TO-I-QT-216-STD |
| 厂商： | Swissbit NA Inc |
| 文件页数： | 28/56页 |
| 文件大小： | 0K |
| 描述： | FLASH CFAST UDMA/MDMA/PIO 16GB |
| 标准包装： | 20 |
| 系列： | F-240 |
| 存储容量： | 16GB |
| 存储器类型： | 存储卡 - CFast? |
| 其它名称： | 1052-1099 |
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Disk errors encountered during Read Multiple commands are posted at the beginning of the block or partial
block transfer, but DRQ is still set and the data transfer will take place as it normally would, including transfer
of corrupted data, if any.
Interrupts are generated when DRQ is set at the beginning of each block or partial block. The error reporting is
the same as that on a Read Sector(s) Command. This command reads from 1 to 256 sectors as specified in the
Sector Count register. A sector count of 0 requests 256 sectors. The transfer begins at the sector specified in the
Sector Number Register.
If an error occurs, the read terminates at the sector where the error occurred. The Command Block Registers
contain the cylinder, head and sector number of the sector where the error occurred. The flawed data are
pending in the sector buffer.
Subsequent blocks or partial blocks are transferred only if the error was a correctable data error. All other errors
cause the command to stop after transfer of the block which contained the error.
Table 31: Read Multiple
Task File Register
7
6
5
4
3
2
1
0
COMMAND
C4h
DRIVE/HEAD
1
LBA
1
D
Head (LBA 27:24)
CYLINDER HI
CYLINDER LOW
SECTOR NUM
SECTOR COUNT
FEATURES
Cylinder High (LBA23:16)
Cylinder Low (LBA15:8)
Sector Number (LBA7:0)
Sector Count
nu
6.17 Read Multiple Ext (29h) 48bit LBA
The Read Multiple Ext command performs similarly to the Read Sectors Ext command. Interrupts are not
generated on every sector, but on the transfer of a block, which contains the number of sectors defined by a Set
Multiple command.
Command execution is identical to the Read Sectors Ext operation except that the number of sectors defined by
a Set Multiple command is transferred without intervening interrupts. DRQ qualification of the transfer is
required only at the start of the data block, not on each sector.
The block count of sectors to be transferred without intervening interrupts is programmed by the Set Multiple
Mode command, which shall be executed prior to the Read Multiple command. When the Read Multiple
command is issued, the Sector Count Register contains the number of sectors (not the number of blocks or the
block count) requested. If the number of requested sectors is not evenly divisible by the block count, as many
full blocks as possible are transferred, followed by a final, partial block transfer. The partial block transfer is for
n sectors, where n = (sector count) modulo (block count).
If the Read Multiple Ext command is attempted before the Set Multiple Mode command has been executed, or
when Read Multiple Ext command is disabled, the Read Multiple Ext operation is rejected with an Aborted
Command error. Disk errors encountered during a Read Multiple Ext command are posted at the beginning of
the block or partial block transfer, but DRQ is still set and the data transfer shall take place as it normally would,
including transfer of corrupted data, if any.
Interrupts are generated when DRQ is set at the beginning of each block or partial block. The error reporting is
the same as that on a Read Sector(s) Command. This command reads from 1 to 65536 sectors as specified in the
Sector Count Register. A sector count of 0 requests 65536 sectors. The transfer begins at the sector specified in
the Sector Number Register.
At command completion, the Command Block Registers contain the LBA of the last sector read.
If an error occurs, the read terminates at the sector where the error occurred. The Command Block Registers
contain the LBA of the sector where the error occurred. The flawed data is pending in the sector buffer.
Subsequent blocks or partial blocks are transferred only if the error was a correctable data error. All other errors
cause the command to stop after transfer of the block that contained the error.
Swissbit AG
Industriestrasse 4
Swissbit reserves the right to change products or specifications without notice.
Revision: 0.92
CH-9552 Bronschhofen
Switzerland
F-240_data_sheet_CA-HxBV_Rev092.doc
Page 28 of 56
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