 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
S29AS008J Datasheet(PDF) 19 Page - SPANSION |
|
|
|||||||||||||||||||||||||||||
S29AS008J Datasheet(HTML) 19 Page - SPANSION |
|
|
19 / 55 page  November 9, 2011 S29AS008J_00_09 S29AS008J 19 Data She e t 7.11 Sector Group Protection/Unprotection The hardware sector group protection feature disables both program and erase operations in any sector group (see Table 7.3 on page 17 to Table 7.6 on page 19). The hardware sector group unprotection feature re-enables both program and erase operations in previously protected sector groups. Sector group protection/unprotection can be implemented via two methods. Sector group protection/unprotection requires VID on the RESET# pin only, and can be implemented either in-system or via programming equipment. Figure 7.1 on page 20 shows the algorithms and Figure 18.11 on page 49 shows the timing diagram. This method uses standard microprocessor bus cycle timing. For sector group unprotect, all unprotected sector groups must first be protected prior to the first sector group unprotect write cycle. The device is shipped with all sector groups unprotected. Spansion offers the option of programming and protecting sector groups at its factory prior to shipping the device through Spansion Programming Service. Contact a Spansion representative for details. It is possible to determine whether a sector group is protected or unprotected. See Autoselect Mode on page 16 for details. Table 7.5 AS008J Top Boot Device Sector/Sector Group Protection Sector / Sector Block A18 A17 A16 A15 A14 A13 A12 Sector / Sector Block Size SA0-SA3 0 0 X X X X X 256 (4x64) Kbytes SA4-SA7 0 1 X X X X X 256 (4x64) Kbytes SA8-SA11 1 0 X X X X X 256 (4x64) Kbytes SA12-SA13 1 1 0 X X X X 128 (2x64) Kbytes SA14 1 1 1 0 X X X 64 Kbytes SA15 1 111 00 0 8 Kbytes SA16 1 111 00 1 8 Kbytes SA17 1 111 01 0 8 Kbytes SA18 1 111 01 1 8 Kbytes SA19 1 111 10 0 8 Kbytes SA20 1 111 10 1 8 Kbytes SA21 1 111 11 0 8 Kbytes SA22 1 111 11 1 8 Kbytes Table 7.6 AS008J Bottom Boot Device Sector/Sector Group Protection Sector / Sector Block A18 A17 A16 A15 A14 A13 A12 Sector / Sector Block Size SA0 0 0 000 00 8 Kbytes SA1 0 0 000 01 8 Kbytes SA2 0 0 000 10 8 Kbytes SA3 0 0 000 11 8 Kbytes SA4 0 0 001 00 8 Kbytes SA5 0 0 001 01 8 Kbytes SA6 0 0 001 10 8 Kbytes SA7 0 0 001 11 8 Kbytes SA8 0 0 0 1 X X X 64 Kbytes SA9-SA10 0 0 1 X X X X 128 (2x64) Kbytes SA11-SA14 0 1 X X X X X 256 (4x64) Kbytes SA15-SA18 1 0 X X X X X 256 (4x64) Kbytes SA19-SA22 1 1 X X X X X 256 (4x64) Kbytes |
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | Link Exchange | Manufacturer List 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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
