Moteur de recherche de fiches techniques de composants électroniques |
|
AT88SC1003 Fiches technique(PDF) 8 Page - ATMEL Corporation |
|
AT88SC1003 Fiches technique(HTML) 8 Page - ATMEL Corporation |
8 / 30 page 8 2035C–SMEM–6/08 AT88SC1003 Application Zone 3 AZ3 (512 bits) AZ3 is intended to hold user application data. P3 (address 1024) controls write access and R3 (address 1025) controls read access within Zone 3. In Security Level 1, erasing AZ3 is accomplished by performing an erase operation on any bit within AZ3 after verification of the security code (SV flag = 1). This operation will erase the entire zone. In Security Level 2, erase operations are controlled by both the SV flag and the erase key EZ3. See Table 14-1 on page 16 for specific details. There is no limit to the number of erase operations performed in AZ3. In Security Level 1, write operations in AZ3 may be performed on single bits after verification of the security code. In Security Level 2, the P3 bit must also be set to “1” to allow single bit write operations. Read operations in Securtiy Levels 1 and 2 are allowed if either R3 is set to “1” or the SV flag is set to “1” by validating the security code. Application Zone 3 Erase Key EZ3 (1 bit) The erase keys are passwords used to control erase operations within the application zones after the issuer fuse has been blown (Security Level 2). The erase key password is written during personalization (Security Level 1) after verification of the security code. EZ3 can not be changed after the issuer fuse is blown. In Security Level 2, AZ3 can be erased only after both the security code and the EZ3 password have been validated. Verification of EZ3 will set the internal flag E3 to “1”. Application Zone 3 Erase Bit EB3 (1 bit) Address location 1584 is designated as the erase bit for Application Zone 3. The erase protocol for an AT88SC1003 in Security Mode 2 requires that the erase key (EZ3) be verified, then an erase operation must be executed on the next bit following the erase key. This action will result in erasing the entire zone. Unused (16 bits) Address locations 1585–1599 are not functional in the AT88SC1003. If the address counter is incremented beyond address 1599, the counter will roll over to address 0. The counter can also be reset to “0” by executing a reset command. Table 6-1. Memory Zones (Continued) Zone Definition |
Numéro de pièce similaire - AT88SC1003_14 |
|
Description similaire - AT88SC1003_14 |
|
|
Lien URL |
Politique de confidentialité |
ALLDATASHEET.FR |
ALLDATASHEET vous a-t-il été utile ? [ DONATE ] |
À propos de Alldatasheet | Publicité | Contactez-nous | Politique de confidentialité | Echange de liens | Fabricants 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 |