 |
数据搜索系统，热门电子元器件搜索 |
|
|
数据搜索系统，热门电子元器件搜索 |
|
M24LR64-R-MB6T/2 数据表(PDF) 24 Page - STMicroelectronics |
|
|
|||||||||||||||||||||||||||||
M24LR64-R-MB6T/2 数据表(HTML) 24 Page - STMicroelectronics |
|
|
24 / 126 page  System memory area M24LR64-R 24/126 Doc ID 15170 Rev 8 ● Present-sector Password: The Present-sector Password command is used to present one of the three passwords to the M24LR64-R in order to modify the access rights of all the memory sectors linked to that password (Table 8) including the password itself. If the presented password is correct, the access rights remain activated until the tag is powered off or until a new Present-sector Password command is issued. If the presented password value is not correct, all the access rights of all the memory sectors are deactivated. ● Sector security status byte area access conditions in I2C mode: In I2C mode, read access to the Sector security status byte area is always allowed. Write access depends on the correct presentation of the I2C password (see I2C Present Password command description on page 26). To access the Sector security status byte area, the device select code used for any I2C command must have the E2 Chip Enable address at 1. An I2C write access to a Sector security status byte re-initializes the RF access condition to the given memory sector. 4.2 Example of the M24LR64-R security protection Table 11 and Table 12 show the sector security protections before and after a valid Present- sector Password command. Table 11 shows the sector access rights of an M24LR64-R after power-up. After a valid Present-sector Password command with password 1, the memory sector access is changed as shown in Table 12. Table 11. M24LR64-R sector security protection after power-up Sector address Sector security status byte b7b6b5 b4 b3 b2 b1 b0 0 Protection: Standard Read No Write xxx 0 0 0 0 1 1 Protection: Pswd 1 Read No Write xxx 010 01 2 Protection: Pswd 1 Read Write xxx 0 1 0 1 1 3 Protection: Pswd 1 No Read No Write xxx 0 1 1 0 1 4 Protection: Pswd 1 No Read No Write xxx 0 1 1 1 1 Table 12. M24LR64-R sector security protection after a valid presentation of password 1 Sector address Sector security status byte b7b6b5 b4 b3 b2 b1 b0 0 Protection: Standard Read No Write xxx 0 0 0 0 1 1 Protection: Pswd 1 Read Write xxx 0 1 0 0 1 2 Protection: Pswd 1 Read Write xxx 0 1 0 1 1 3 Protection: Pswd 1 Read Write xxx 0 1 1 0 1 4 Protection: Pswd 1 Read No Write xxx 0 1 1 1 1 |
|
链接网址 |
| 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 | 数据表链接 | 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 |
Chinese ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
