參數(shù)資料
型號(hào)： SDCFBI-30-101
廠商： SANDISK CORP
元件分類： 存儲(chǔ)控制器/管理單元
英文描述： FLASH MEMORY DRIVE CONTROLLER, XMA50
封裝： PC CARD-50
文件頁(yè)數(shù)： 24/124頁(yè)
文件大?。?/td> 769K
代理商： SDCFBI-30-101
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CompactFlash Memory Card Product Manual
SanDisk CompactFlash Memory Card Product Manual 1999 SANDISK CORPORATION
12
1.7.5
True IDE Mode
The CompactFlash Memory Card differs from t h e
SDP5A FlashDisk in that it can be configured in
True IDE Mode. See section 4.6 True IDE Mode I/O
Transfer Function.
1.7.6
Identify Drive Information
Word 51 of the
Identify
Drive
Command
information has a default value of 0000H for t h e
SDP5A
FlashDisk.
The
data
field
type
information for this word is PIO data transfer
cycle timing mode 0.
For the CompactFlash Memory Card, word 51 of
the Identify Drive Command information has a
default value of 0001H. The data field type
information for this word is PIO data transfer
cycle timing mode 1.
1.8
Functional Description
CompactFlash Memory Cards contain a high
level, intelligent subsystem as shown in the block
diagram,
Figure
1-1.
This
intelligent
(microprocessor)
subsystem
provides
many
capabilities not found in other types of memory
cards. These capabilities include:
1. Standard ATA register and command set
(same as found on most magnetic disk
drives).
2.
Host independence from details of erasing
and programming flash memory.
3. Sophisticated
system
for
managing
defects (analogous to systems found in
magnetic disk drives).
4. Sophisticated system for error recovery
including a powerful error correction code
(ECC).
5. Power
management
for
low
power
operation.
1.8.1
Flash Technology Independence
The 512 byte sector size of CompactFlash Memory
Card is the same as that in an IDE magnetic disk
drive. To write or read a sector (or multiple
sectors), the host computer software simply issues
a Read or Write command to the CompactFlash
Memory Card. This command contains the address
and the number of sectors to write/read. The host
software then waits for the command to complete.
The host software does not get involved in t h e
details of how the flash memory is erased,
programmed or read. This is extremely important
as flash devices are expected to get more and more
complex in the future. Since the CompactFlash
Memory Card Series uses an intelligent on-board
controller, the host system software will not
require changing as new flash memory evolves. In
other
words,
systems
that
support
t h e
CompactFlash Memory Card today will be able to
access future SanDisk cards built with new flash
technology without having to update or change
host software.
1.8.2
Defect and Error Management
CompactFlash
Memory
Cards
contain
a
sophisticated
defect
and
error
management
system. This system is analogous to the systems
found in magnetic disk drives and in many cases
offers enhancements. For instance, disk drives do
not typically perform a read after write to confirm
the data is written correctly because of t h e
performance penalty that would be incurred.
CompactFlash Memory Cards do a read after
write under margin conditions to verify that t h e
data is written correctly (except in the case of a
Write without Erase Command). In the rare case
that a bit is found to be defective, CompactFlash
Memory Cards replace this bad bit with a spare
bit within
the sector header.
If
necessary,
CompactFlash Memory Cards will even replace
the entire sector with a spare sector. This is
completely transparent to the host and does not
consume any user data space.
The CompactFlash Memory Card soft error rate
specification is much better than the magnetic
disk drive specification. In the extremely rare
case a read error does occur, CompactFlash
Memory Cards have innovative algorithms to
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SDCFCF-001G-388 功能描述:COMPACT FLASH IND 1GB FIXED RoHS:是 類別:存儲(chǔ)卡，模塊 >> 存儲(chǔ)器，PC 卡 系列:- 標(biāo)準(zhǔn)包裝:30 系列:- 存儲(chǔ)容量:8GB 存儲(chǔ)器類型:存儲(chǔ)卡 - Extreme III SD?
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SDCFCF-004G-388 功能描述:COMPACT FLASH IND 4GB FIXED RoHS:是 類別:存儲(chǔ)卡，模塊 >> 存儲(chǔ)器，PC 卡 系列:- 標(biāo)準(zhǔn)包裝:30 系列:- 存儲(chǔ)容量:8GB 存儲(chǔ)器類型:存儲(chǔ)卡 - Extreme III SD?
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