![]() |
Electronic Components Datasheet Search |
|
S29AL008D Datasheet(PDF) 16 Page - SPANSION |
|
|
S29AL008D Datasheet(HTML) 16 Page - SPANSION |
16 / 55 page ![]() 16 S29AL008D S29AL008D_00A3 June 16, 2005 Da t a S h ee t L = Logic Low = VIL, H = Logic High = VIH, SA = Sector Address, X = Don’t care. Sector Protection/Unprotection The hardware sector protection feature disables both program and erase opera- tions in any sector. The hardware sector unprotection feature re-enables both program and erase operations in previously protected sectors. The device is shipped with all sectors unprotected. Spansion offers the option of programming and protecting sectors at its factory prior to shipping the device through Spansion’s ExpressFlash™ Service. Contact an Spansion representative for details. It is possible to determine whether a sector is protected or unprotected. See Autoselect Mode, on page 15 for details. Sector Protection/unprotection can be implemented via two methods. The primary method requires VID on the RESET# pin only, and can be imple- mented either in-system or via programming equipment. Figure 2, on page 18 shows the algorithms and Figure 23, on page 47 shows the timing diagram. This method uses standard microprocessor bus cycle timing. For sector unprotect, all unprotected sectors must first be protected prior to the first sector unprotect write cycle. The alternate method intended only for programming equipment requires VID on address pin A9 and OE#. This method is compatible with programmer routines written for earlier 3.0 volt-only Spansion flash devices. Publication number 20536 contains further details; contact an Spansion representative to request a copy. Temporary Sector Unprotect This feature allows temporary unprotection of previously protected sectors to change data in-system. The Sector Unprotect mode is activated by setting the RESET# pin to VID. During this mode, formerly protected sectors can be pro- grammed or erased by selecting the sector addresses. Once VID is removed from the RESET# pin, all the previously protected sectors are protected again. Table 4. S29AL008D Autoselect Codes (High Voltage Method) Description Mode CE# OE# WE# A18 to A12 A11 to A10 A9 A8 to A7 A6 A5 to A2 A1 A0 DQ8 to DQ15 DQ7 to DQ0 Manufacturer ID: Spansion L L H X X VID X L X L L X 01h Device ID: Am29LV800B (Top Boot Block) Word L L H X X VID X L X L H 22h DAh Byte L L H X DAh Device ID: Am29LV800B (Bottom Boot Block) Word L L H X X VID X L X L H 22h 5Bh Byte L L H X 5Bh Sector Protection Verification L L H SA X VID X L X H L X 01h (protected) X 00h (unprotected ) |
Similar Part No. - S29AL008D |
|
Similar Description - S29AL008D |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | 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 |