- 您現在的位置：買賣IC網 > PDF目錄382300 > MC2GH512DMCA-2SA00 (SAMSUNG SEMICONDUCTOR CO. LTD.) SAMSUNG MultiMediaCard PDF資料下載
參數資料
| 型號： | MC2GH512DMCA-2SA00 |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | SAMSUNG MultiMediaCard |
| 中文描述： | 三星多媒體 |
| 文件頁數： | 51/102頁 |
| 文件大小： | 1384K |
| 代理商： | MC2GH512DMCA-2SA00 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁當前第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁
MultiMediaCard
TM
51
Sep.22.2005
Revision 0.3
6.2.11 Card Lock/Unlock Operation
The password protection feature enables the host to lock the card by providing a password, which later will be used for
unlocking the card. The password and its size is kept in an 128 bit PWD and 8 bit PWD_LEN registers, respectively. These
registers are non-volatile so that a power cycle will not erase them.
A locked card responds to (and executes) all commands in the “basic” command class (class 0) and “lock card” command
class. Thus the host is allowed to reset, initialize, select, query for status, etc., but not to access data on the card. If the
password was previously set (the value of PWD_LEN is not ‘0’) the card will be locked automatically after power on.
Similar to the existing CSD and CID register write commands the lock/unlock command is available in “transfer state” only.
This means that it does not include an address argument and the card has to be selected before using it.
The card lock/unlock command has the structure and bus transaction type of a regular single block write command. The
transferred data block includes all the required information of the command (password setting mode, PWD itself, card lock/
unlock etc.). The following table describes the structure of the command data block.
Table 6-6 : Lock Card Data Structure
Byte #
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
Reserved
ERASE
LOCK_UNLOCK
CLR_PWD
SET_PWD
1
PWD_LEN
2
Password data
...
PWD_LEN + 1
ERASE:
‘1’ Defines Forced Erase Operation (all other bits shall be ‘0’) and only the cmd byte is sent.
LOCK/UNLOCK
: ‘1’ = Locks the card. ‘0’ = Unlock the card (note that it is valid to set this bit together with SET_PWD
but it is not allowed to set it together with CLR_PWD).
CLR_PWD
: ‘1’ = Clears PWD.
SET_PWD
: ‘1’ = Set new password to PWD
PWD_LEN
: Defines the following password length (in bytes). Valid password length are 1 to 16 bytes.
PWD:
The password (new or currently used depending on the command).
The data block size shall be defined by the host before it sends the card lock/unlock command. This will allow different
password sizes.
The following paragraphs define the various lock/unlock command sequences:
Setting the Password
Select the card (CMD7), if not previously selected already
Define the block length (CMD16), given by the 8bit card lock/unlock mode, the 8 bits password size (in bytes),
and the number of bytes of the new password. In case that a password
replacement
is done, then the block
size shall consider that both passwords, the old and the new one, are sent with the command.
Send 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 (SET_PWD), the length (PWD_LEN) and the password itself. In case
that a password
replacement
is done, then the length value (PWD_LEN) shall include both passwords, the old
and the new one, and the PWD field shall include the old password (currently used) followed by the new pass
word.
In case that a password replacement is attempted with PWD_LEN set to the length of the old pass-word only,
the LOCK_UNLOCK_FAILED error bit is set in the status register and the old password is not changed.
In case that the sent old password is not correct (not equal in size and content) then LOCK_UNLOCK_FAILED
error bit will be set in the status register and the old password does not change. In case that PWD matches the
sent old password then the given new password and its size will be saved in the PWD and PWD_LEN fields,
respectively.
相關PDF資料 |
PDF描述 |
|---|---|
| MC2GH512NMCA-2SA00 | SAMSUNG MultiMediaCard |
| MC4GH01GNMCA-2SA00 | SAMSUNG MultiMediaCard |
| MC4GH02GNMCA-2SA00 | SAMSUNG MultiMediaCard |
| MC206 | THIN SMD LOW/MEDIUM-FREQUENCY CRYSTAL UNIT |
| MC2300 | Navigator Motion Processor |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MC2GH512NMCA-2SA00 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:SAMSUNG MultiMediaCard |
| MC2GU01GNMCA-0QC00 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:MultiMediaCard Specification |
| MC2GU512NMCA-0QC00 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:MultiMediaCard Specification |
| MC2M | 制造商:G & J HALL 功能描述:STEP DRILL 10-20MM 1MM STEP 制造商:G & J HALL 功能描述:STEP DRILL, 10-20MM, 1MM STEP 制造商:G & J HALL 功能描述:STEP DRILL, 10-20MM, 1MM STEP; Drill Bit Size Metric:10mm; Overall Length:77.5mm; SVHC:No SVHC (19-Dec-2012); Drill Bit Type:Step; Material:Steel; Material Thickness Max:4mm; Range:10mm - 20mm; Range:10mm - 20mm; Shank Dia:9mm; ;RoHS Compliant: NA |
| MC2N2906A | 制造商:SPC Multicomp 功能描述:BIPOLAR TRANSISTOR, PNP, -60V TO-18; Transistor Polarity:PNP; Collector Emitter Voltage V(br)ceo:-60V; Transition Frequency Typ ft:200MHz; Power Dissipation Pd:400mW; DC Collector Current:-600mA; DC Current Gain hFE:40; No. of Pins:3;RoHS Compliant: Yes |
發布緊急采購，3分鐘左右您將得到回復。