參數(shù)資料
型號： MC12U064DACA-2QC00
廠商： SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述： Dual Voltage MultiMediaCard Specification
中文描述： 雙電壓多媒體卡規(guī)格
文件頁數(shù)： 9/64頁
文件大?。?/td> 1385K
代理商： MC12U064DACA-2QC00
MultiMediaCard
TM
2.6.5 Memory Array Partitioning
Although the MultiMediaCard memory space is byte addressable with addresses ranging from 0 to the
last byte, it is not a simple byte array but divided into several structures. Memory bytes are grouped
into 512 byte blocks called sectors. Every block can be read, written individually.
Erase group is a number of sectors. Its size is the number of consecutive sectors. Any combination of
erase groups can be erased in a single erase command. A write command implicitly erases the
memory before writing new data into it. Explicit erase command can be used for pre-erasing of memory
to speed up the next write operation.
Write Protect Groups (WPG) is the minimal units that may have individual write protection. Its size is
the number of erase units that will be write protected by on bit. The write/erase access to each WPG
can be limited individually. The number of various memory structures, for the different MultiMediaCards
are summarized in Table 2-1.
Table 2-1 Memory Array Structure
Bytes
32MB
64MB
Sectors
62,720
125,440
Erase Group
1,960
3,920
WPG
490
980
Read and Write Operations
The MultiMediaCard supports two read/write modes.
Single Block Mode
In this mode the host reads or writes one data block in a pre-specified length block transmission is
protected with 16 bit CRC which is generated by the sending unit and checked by the receiving unit.
Misalignment is not allowed. Every data block must be contained in a single memory sector. The block
length for write operations must be identical to the sector size and the start address aligned to a sector
boundary.
Multiple Block Mode
This mode is similar to the single block mode, but the host can read/write multiple data blocks (all have
the same length) which will be stored or retrieved from contiguous memory addresses starting at the
address specified in the command.
The operation is terminated with a stop transmission command. Misalignment and block length
restrictions apply to multiple blocks as well and are identical to the single block read/write operations.
Multiple block read with pre-defined block is supported.
2.6.6 Data Protection in the Flash Card
Every sector is protected with an Error Correction Code (ECC). The ECC is generated (in the memory
card) when the sectors are written and validated when the data is read. If defects are found, the data is
corrected prior to transmission to the host.
The MultiMediaCard can be considered error free and no additional data protection is needed.
However, if an application uses additional, external, ECC protection, the data organization is defined in
the user writeable section of the CSD register
2.6.7 Erase
128MB
250,880
7,840
1,960
9
相關(guān)PDF資料
PDF描述
MC12U128DACA-2QC00 Dual Voltage MultiMediaCard Specification
MC14024B 7 Stage Ripple Counter(7位二進(jìn)制計數(shù)器)
MC14029B Binary/Decade Up/Down Counter(二/十進(jìn)制 增/減計數(shù)器)
MC1403B Low Voltage Reference(低電壓參考源)
MC1403 Low Voltage Reference(低電壓參考源)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC12U064HACA 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:MultiMediaCard Specification
MC12U064HACA-0QC00 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:MultiMediaCard Specification
MC12U064HACB-0QC00 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:MultiMediaCard Specification
MC12U064HACC-0QC00 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:MultiMediaCard Specification
MC12U064HAFA-0QC00 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:MultiMediaCard Specification
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*