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參數(shù)資料
| 型號(hào)： | 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(yè)數(shù)： | 33/64頁(yè) |
| 文件大小： | 1385K |
| 代理商： | MC12U064DACA-2QC00 |
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MultiMediaCard
TM
4.7
Read, Write and Erase Time-out Conditions
The times after which a time-out condition for read/write/erase operations occurs are (card indepen-
dent) 10 times longer than the access/program times for these operations given below. A card shall
complete the command within this time period, or give up and return an error message. If the host does
not get a response within the defined time-out it should assume the card is not going to respond
anymore and try to recover (e.g. reset the card, power cycle, reject, etc.). The typical access and
program times are defined as follows
Read
The read access time is defined as the sum of the two times given by the CSD parameters TAAC and
NSAC (refer to Table “Card Specific Data (CSD)”). These card parameters define the typical delay
between the end bit of the read command and the start bit of the data block. This number is card
dependent and should be used by the host to calculate throughput and the maximal frequency for
stream read.
Write
The R2W_FACTOR field in the CSD is used to calculate the typical block program time obtained by
multiplying the read access time by this factor. It applies to all write/erase commands (e.g.
SET(CLEAR)_WRITE_PROTECT, PROGRAM_CSD(CID) and the block write commands). It should
be used by the host to calculate throughput.
Erase
The duration of an erase command will be (order of magnitude) the number of sectors to be erased
multiplied by the block write delay.
4.8 Card Identification Mode
All the data communication in the card identification mode uses only the command line (CMD).
MultiMediaCard State Diagram
(Card Identification Mode)
33
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(jì)數(shù)器) |
| MC14029B | Binary/Decade Up/Down Counter(二/十進(jìn)制 增/減計(jì)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 |
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