Moteur de recherche de fiches techniques de composants électroniques |
|
S29GL01GT10FHIyyx Fiches technique(PDF) 13 Page - Cypress Semiconductor |
|
S29GL01GT10FHIyyx Fiches technique(HTML) 13 Page - Cypress Semiconductor |
13 / 105 page Document Number: 002-00247 Rev. *G Page 13 of 105 S29GL01GT, S29GL512T 3.4 Sector Protection Methods 3.4.1 Write Protect Signal If WP# = VIL, the lowest or highest address sector is protected from program or erase operations independent of any other ASP configuration. Whether it is the lowest or highest sector depends on the device ordering option (model) selected. If WP# = VIH, the lowest or highest address sector is not protected by the WP# signal but it may be protected by other aspects of ASP configuration. WP# has an internal pull-up; when unconnected, WP# is at VIH. WP# should not change between VIL and VIH during any embedded operation. 3.4.2 ASP Advanced Sector Protection (ASP) is a set of independent hardware and software methods used to disable or enable programming or erase operations, individually, in any or all sectors. This section describes the various methods of protecting data stored in the memory array. An overview of these methods is shown in Figure 3.1. Figure 3.1 Advanced Sector Protection Overview Every main flash array sector has a non-volatile (PPB) and a volatile (DYB) protection bit associated with it. When either bit is 0, the sector is protected from program and erase operations. The PPB bits are protected from program and erase when the PPB Lock bit is 0. There are two methods for managing the state of the PPB Lock bit, Persistent Protection and Password Protection. Password Method (DQ2) Persistent Method (DQ1) Lock Register (One Time Programmable) PPB Lock Bit 1,2,3 64-bit Password (One Time Protect) 1 = PPBs Unlocked 0 = PPBs Locked Memory Array Sector 0 Sector 1 Sector 2 Sector N-2 Sector N-1 Sector N 4 PPB 0 PPB 1 PPB 2 PPB N-2 PPB N-1 PPB N Persistent Protection Bit (PPB) 5,6 DYB 0 DYB 1 DYB 2 DYB N-2 DYB N-1 DYB N Dynamic Protection Bit (DYB) 7,8,9 7. 0 = Sector Protected, 1 = Sector Unprotected. 8. Protect effective only if corresponding PPB is “1” (unprotected). 9. Volatile Bits: defaults to user choice upon power-up (see ordering options). 5. 0 = Sector Protected, 1 = Sector Unprotected. 6. PPBs programmed individually, but cleared collectively 1. Bit is volatile, and defaults to “1” on reset (to “0” if in Password Mode). 2. Programming to “0” locks all PPBs to their current state. 3. Once programmed to “0”, requires hardware reset to unlock or application of the password. 4. N = Highest Address Sector. |
Numéro de pièce similaire - S29GL01GT10FHIyyx |
|
Description similaire - S29GL01GT10FHIyyx |
|
|
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 |