数据搜索系统,热门电子元器件搜索 |
|
MC1GU016HAYA-0QC00 数据表(PDF) 40 Page - Samsung semiconductor |
|
MC1GU016HAYA-0QC00 数据表(HTML) 40 Page - Samsung semiconductor |
40 / 66 page MultiMediaCard TM 40 * 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 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 (CMD 16), given by the 8bit card lock/unlock mode, the 8bit 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. * Locking a 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 LOCK, the length (PWD_LEN) and the password (PWD) itself. If the PWD content equals to the sent password then the card will be locked and the card-locked status bit will be set in the status register. If the password is not correct then LOCK_UNLOCK_FAILED error bit will be set in the status register. Note that it is possible to set the password and to lock the card in the same sequence. In such case the host shall perform all the required steps for setting the password (as described above) including the bit LOCK set while the new password command is sent. If the password was previously set (PWD_LEN is not ‘0’), then the card will be locked automatically after power on reset. An attempt to lock a locked card or to lock a card that does not have a password will fail and the LOCK_UNLOCK_FAILED error bit will be set in |
类似零件编号 - MC1GU016HAYA-0QC00 |
|
类似说明 - MC1GU016HAYA-0QC00 |
|
|
链接网址 |
隐私政策 |
ALLDATASHEETCN.COM |
ALLDATASHEET是否为您带来帮助? [ DONATE ] |
关于 Alldatasheet | 广告服务 | 联系我们 | 隐私政策 | 链接交换 | 制造商名单 All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |