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參數(shù)資料
| 型號： | HB28J128MM3 |
| 廠商： | Renesas Technology Corp. |
| 英文描述： | MultiMediaCard 32 MByte/64 MByte/128 MByte/256 MByte/512 MByte |
| 中文描述： | 多媒體32 MByte/64 MByte/128 MByte/256 MByte/512字節(jié) |
| 文件頁數(shù)： | 40/91頁 |
| 文件大小： | 526K |
| 代理商： | HB28J128MM3 |
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HB28K032/L064/J128/J256/J512MM3, HB28K032/L064/J128/J256RM3
Rev.0.02, Sep.15.2004, page 40 of 89
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).
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 a card (CMD7), if not previously selected already.
Define the block length (CMD16), given by the 8bit card lock/unlock mode, the 8-bit
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 password.
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.
Note that the password length register (PWD_LEN) indicates if a password is currently set. When it equals
‘
0
’
there is no password set. If the value of PWD_LEN is not equal to zero the card will lock itself after
power up. It is possible to lock the card immediately in the current power session by set-ting the
LOCK/UNLOCK bit (while setting the password) or sending additional command for card lock.
Reset the Password:
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 CLR_PWD, the length
(PWD_LEN) and the password (PWD) itself (LOCK/UNLOCK bit is don
’
t care). If the PWD
and PWD_LEN content match the sent password and its size, then the content of the PWD
register is cleared and PWD_LEN is set to 0. If the password is not correct then the
LOCK_UNLOCK_FAILED error bit will be set in the status register.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HB28J128RM3 | MultiMediaCard 32 MByte/64 MByte/128 MByte/256 MByte/512 MByte |
| HB28J256MM3 | MultiMediaCard 32 MByte/64 MByte/128 MByte/256 MByte/512 MByte |
| HB28J256RM3 | MultiMediaCard 32 MByte/64 MByte/128 MByte/256 MByte/512 MByte |
| HB28L064RM3 | MultiMediaCard 32 MByte/64 MByte/128 MByte/256 MByte/512 MByte |
| HB28K032MM3 | MultiMediaCard 32 MByte/64 MByte/128 MByte/256 MByte/512 MByte |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HB2A102K-S265B | 制造商:Hitano Enterprise Corp 功能描述:Bulk |
| HB2A102K-S565B | 制造商:Hitano Enterprise Corp 功能描述:Bulk |
| HB2A103K-S565B | 制造商:Hitano Enterprise Corp 功能描述: |
| HB2A122K-S265B | 制造商:Hitano Enterprise Corp 功能描述: |
| HB2A122K-S565B | 制造商:Hitano Enterprise Corp 功能描述:Bulk |
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