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参数资料
| 型号： | SFCF8192H2BU2TO-I-QT-517-STD |
| 厂商： | Swissbit NA Inc |
| 文件页数： | 71/102页 |
| 文件大小： | 0K |
| 描述： | FLASH SLC UDMA/MDMA/PIO 8GB |
| 标准包装： | 1 |
| 系列： | C-440 |
| 存储容量： | 8GB |
| 存储器类型： | CompactFlash? |
| 其它名称： | 1052-1092 |
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Table 67: Initialize Drive Parameter s
Task File Register
7
6
5
4
3
2
1
0
COMMAND
91h
DRIVE/HEAD
nu
nu
nu
D
Number of Heads minus 1
CYLINDER HI
CYLINDER LOW
SECTOR NUM
SECTOR COUNT
FEATURES
nu
nu
nu
Number of Sectors per Track
nu
10.12 NOP (00h)
This command always fails with the CompactFlash TM Memory Card returning command aborted. Table 68 defines
the Byte sequence of the NOP command.
Table 68: NOP
Task File Register
7
6
5
4
3
2
1
0
COMMAND
00h
DRIVE/HEAD
nu
nu
nu
D
nu
CYLINDER HI
CYLINDER LOW
SECTOR NUM
SECTOR COUNT
FEATURES
nu
nu
nu
nu
nu
10.13 Read Buffer (E4h)
The Read Buffer command enables the host to read the current contents of the Card’s sector buffer. This co mmand
has the same protocol as the Read Sector(s) command. Table 69 defines the Read Buffer command Byte sequence.
Table 69: Read buffer
Task File Register
7
6
5
4
3
2
1
0
COMMAND
E4h
DRIVE/HEAD
nu
nu
nu
D
nu
CYLINDER HI
CYLINDER LOW
SECTOR NUM
SECTOR COUNT
FEATURES
nu
nu
nu
nu
nu
10.14 Read DMA (C8h)
This command uses DMA mode to read from 1 to 256 sectors as specified in the Sector Count register. A sector
count of a requests 256 sectors. The transfer begins at the sector specified in the Sector Number Register. When
this command is issued the CompactFlash TM Storage Card sets BSY, puts all or part of the sector of data in the
buffer. The Card is then permitted, although not required, to set DRQ, clear BSY. The Card asserts DMAREQ while
data is available to be transferred. The Card asserts DMAREQ while data is available to be transferred. The host
then reads the (512 * sector-count) bytes of data from the Card using DMA. While DMAREQ is asserted by the Card,
the Host asserts – DMACK while it is ready to transfer data by DMA and asserts – IORD once for each 16 bit word to
be transferred to the Host.
Interrupts are not generated on every sector, but upon completion of the transfer of the entire number of sectors
to be transferred or upon the occurrence of an unrecoverable error.
At command completion, the Command Block Registers contain the cylinder, head and sector number 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 cylinder, head, and sector number of the sector where the error occurred. The amount of
data transferred is indeterminate.
When a Read DMA command is received by the Card and 8 bit transfer mode has been enabled by the Set Features
command, the Card shall return the Aborted error.
Swissbit AG
Industriestrasse 4
Swissbit reserves the right to change products or specifications without notice.
Revision: 1.00
CH-9552 Bronschhofen
Switzerland
www.swissbit.com
industrial@swissbit.com
C-440_data_sheet_CF-HxBU_Rev100.doc
Page 71 of 102
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