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AM29DL322GT40PCF Datasheet(PDF) 20 Page - SPANSION |
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AM29DL322GT40PCF Datasheet(HTML) 20 Page - SPANSION |
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20 / 58 page  18 Am29DL32xG 25686B10 December 4, 2006 D A TA SH EET Sector/Sector Block Protection and Unprotection (Note: For the following discussion, the term “sector” applies to both sectors and sector blocks. A sector block consists of two or more adjacent sectors that are protected or unprotected at the same time (see Tables 8 and 9). The hardware sector protection feature disables both program and erase operations in any sector. The hard- ware sector unprotection feature re-enables both pro- gram and erase operations in previously protected sectors. Sector protection/unprotection can be imple- mented via two methods. Table 8. Top Boot Sector/Sector Block Addresses for Protection/Unprotection Table 9. Bottom Boot Sector/Sector Block Addresses for Protection/Unprotection Sector protection/unprotection requires V ID on the RE- SET# pin only, and can be implemented either in-sys- tem or via programming equipment. Figure 2 shows the algorithms and Figure 25 shows the timing dia- gram. This method uses standard microprocessor bus cycle timing. For sector unprotect, all unprotected sec- tors must first be protected prior to the first sector un- protect write cycle. The sector unprotect algorithm unprotects all sectors in parallel. All previously protected sectors must be in- dividually re-protected. To change data in protected sectors efficiently, the temporary sector unprotect function is available. See “Temporary Sector Unpro- tect”. The device is shipped with all sectors unprotected. AMD offers the option of programming and protecting sectors at its factory prior to shipping the device through AMD’s ExpressFlash™ Service. Contact an AMD representative for details. Sector A20–A12 Sector/ Sector Block Size SA0 000000XXX 64 Kbytes SA1-SA3 000001XXX, 000010XXX 000011XXX 192 (3x64) Kbytes SA4-SA7 0001XXXXX 256 (4x64) Kbytes SA8-SA11 0010XXXXX 256 (4x64) Kbytes SA12-SA15 0011XXXXX 256 (4x64) Kbytes SA16-SA19 0100XXXXX 256 (4x64) Kbytes SA20-SA23 0101XXXXX 256 (4x64) Kbytes SA24-SA27 0110XXXXX 256 (4x64) Kbytes SA28-SA31 0111XXXXX 256 (4x64) Kbytes SA32-SA35 1000XXXXX 256 (4x64) Kbytes SA36-SA39 1001XXXXX 256 (4x64) Kbytes SA40-SA43 1010XXXXX 256 (4x64) Kbytes SA44-SA47 1011XXXXX 256 (4x64) Kbytes SA48-SA51 1100XXXXX 256 (4x64) Kbytes SA52-SA55 1101XXXXX 256 (4x64) Kbytes SA56-SA59 1110XXXXX 256 (4x64) Kbytes SA60-SA62 111100XXX, 111101XXX, 111110XXX 192 (3x64) Kbytes SA63 111111000 8 Kbytes SA64 111111001 8 Kbytes SA65 111111010 8 Kbytes SA66 111111011 8 Kbytes SA67 111111100 8 Kbytes SA68 111111101 8 Kbytes SA69 111111110 8 Kbytes SA70 111111111 8 Kbytes Sector A20–A12 Sector/Sector Block Size SA70 111111XXX 64 Kbytes SA69-SA67 111110XXX, 111101XXX, 111100XXX 192 (3x64) Kbytes SA66-SA63 1110XXXXX 256 (4x64) Kbytes SA62-SA59 1101XXXXX 256 (4x64) Kbytes SA58-SA55 1100XXXXX 256 (4x64) Kbytes SA54-SA51 1011XXXXX 256 (4x64) Kbytes SA50-SA47 1010XXXXX 256 (4x64) Kbytes SA46-SA43 1001XXXXX 256 (4x64) Kbytes SA42-SA39 1000XXXXX 256 (4x64) Kbytes SA38-SA35 0111XXXXX 256 (4x64) Kbytes SA34-SA31 0110XXXXX 256 (4x64) Kbytes SA30-SA27 0101XXXXX 256 (4x64) Kbytes SA26-SA23 0100XXXXX 256 (4x64) Kbytes SA22–SA19 0011XXXXX 256 (4x64) Kbytes SA18-SA15 0010XXXXX 256 (4x64) Kbytes SA14-SA11 0001XXXXX 256 (4x64) Kbytes SA10-SA8 000011XXX, 000010XXX, 000001XXX 192 (3x64) Kbytes SA7 000000111 8 Kbytes SA6 000000110 8 Kbytes SA5 000000101 8 Kbytes SA4 000000100 8 Kbytes SA3 000000011 8 Kbytes SA2 000000010 8 Kbytes SA1 000000001 8 Kbytes SA0 000000000 8 Kbytes |
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