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參數資料
型號： MC28U032NACA
廠商： SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述： MultiMediaCard Specification
中文描述： 多媒體卡規格
文件頁數： 41/66頁
文件大小： 1422K
代理商： MC28U032NACA
MultiMediaCard
TM
41
the status register.
* Unlocking the card:
- Select a card (CMD7), if not previously selected already.
- Define the block length (CMD16), given by the 8 bit card lock/unlock mode, the 8 bit password
size (in bytes), and the number of bytes of the currently used password.
- Send the card lock/unlock command with the appropriate data block size on the data line
including 16 bit CRC. The data block shall indicate the mode UNLOCK, the length (PWD_LEN)
and the password (PWD) itself.
If the PWD content equals to the sent password then the card will be unlocked and the card-locked
status bit will be cleared in the status register. If the password is not correct then the
LOCK_UNLOCK_FAILED error bit will be set in the status register. Note that the unlocking is done
only for the current power session. As long as the PWD is not cleared the card will be locked
automatically on the next power up. The only way to unlock the card is by clearing the password. An
attempt to unlock an unlocked card will fail and LOCK_UNLOCK_FAILED error bit will be set in the
status register.
*
Forcing Erase:
In case that the user forgot the password (the PWD content) it is possible to erase all the card data
content along with the PWD content. This operation is called Forced Erase.
- Select a card (CMD7), if not previously selected already.
- Define the block length (CMD16) to 1 byte (8bit card lock/unlock command). Send the card
lock/unlock command with the appropriate data block of one byte on the data line including 16 bit
CRC. The data block shall indicate the mode ERASE (the ERASE bit shall be the only bit set).
If the ERASE bit is not the only bit in the data field then the LOCK_UNLOCK_FAILED error bit will be
set in the status register and the erase request is rejected. If the command was accepted then ALL
THE CARD CONTENT WILL BE ERASED including the PWD and PWD_LEN register content and
the locked card will get unlocked. An attempt to force erase on an unlocked card will fail and
LOCK_UNLOCK_FAILED error bit will be set in the status register.
*
State transition summary
Table “Card State Transition Table” defines the card state transitions as a function of received
command
4.9.6 Responses
All responses are sent via command line (CMD), all data starts with the MSB.
Table 4-10 Format R1(Response Command)
0
0
bit5 … bit0
Bit31 … bit0
start bit
card
command
status
The contents of the status field are described in Chapter “Status
Format R1b (response command with busy signal):
Bit6 … bit0
CRC
1
end bit
相關PDF資料
PDF描述
MC28U064HACA MultiMediaCard Specification
MC28U064NACA MultiMediaCard Specification
MC28U128HACA MultiMediaCard Specification
MC28U128NACA MultiMediaCard Specification
MC1GU032HACA Film Capacitor; Capacitor Type:Motor Start/Motor Run; Voltage Rating:370VAC; Capacitor Dielectric Material:Polypropylene; Capacitance:2uF; Capacitance Tolerance:+/- 10%; Lead Pitch:20.6mm; Series:MPF; Termination:Quick Connect RoHS Compliant: Yes
相關代理商/技術參數
參數描述
MC28U032NACA-0QC00 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:MultiMediaCard Specification
MC28U032NACB-0QC00 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:MultiMediaCard Specification
MC28U032NACC-0QC00 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:MultiMediaCard Specification
MC28U032NAFA-0QC00 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:MultiMediaCard Specification
MC28U032NAFB-0QC00 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:MultiMediaCard Specification
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