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AM29DL322DB70RWDI 数据表(PDF) 18 Page - Advanced Micro Devices |
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AM29DL322DB70RWDI 数据表(HTML) 18 Page - Advanced Micro Devices |
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18 / 56 page  December 13, 2005 Am29DL322D/323D/324D 17 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 program 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 The primary method requires V ID on the RESET# pin only, and can be implemented either in-system or via programming equipment. Figure 2 shows the algo- rithms and Figure 25 shows the timing diagram. This method uses standard microprocessor bus cycle tim- ing. For sector unprotect, all unprotected sectors must first be protected prior to the first sector unprotect 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 fu nction is availabl e. See “Tempo r a r y Sector Unprotect”. 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 (4x64) 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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