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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AM29LV640MT100REF датащи(PDF) 22 Page - Advanced Micro Devices |
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AM29LV640MT100REF датащи(HTML) 22 Page - Advanced Micro Devices |
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22 / 66 page  20 Am29LV640MT/B 26190C8 February 1, 2007 D A TA SH EE T Sector Group Protection and Unprotection The hardware sector group protection feature disables both program and erase operations in any sector group. In this device, a sector group consists of four adjacent sectors that are protected or unprotected at the same time (see Tables 5 and 6). The hardware sector group unprotection feature re-enables both pro- gram and erase operations in previously protected sector groups. Sector group protection/unprotection can be implemented via two methods. 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 24 shows the timing dia- gram. This method uses standard microprocessor bus cycle timing. For sector group unprotect, all unpro- tected sector groups must first be protected prior to the first sector group unprotect write cycle. The device is shipped with all sector groups unpro- tected. AMD offers the option of programming and pro- tecting sector groups at its factory prior to shipping the device through AMD’s ExpressFlash™ Service. Con- tact an AMD representative for details. It is possible to determine whether a sector group is protected or unprotected. See Autoselect Mode on page 19 Table 5. Am29LV640MT Top Boot Sector Protection Sector A21–A12 Sector/ Sector Block Size SA0-SA3 00000XXXXX 256 (4x64) Kbytes SA4-SA7 00001XXXXX 256 (4x64) Kbytes SA8-SA11 00010XXXXX 256 (4x64) Kbytes SA12-SA15 00011XXXXX 256 (4x64) Kbytes SA16-SA19 00100XXXXX 256 (4x64) Kbytes SA20-SA23 00101XXXXX 256 (4x64) Kbytes SA24-SA27 00110XXXXX 256 (4x64) Kbytes SA28-SA31 00111XXXXX 256 (4x64) Kbytes SA32-SA35 01000XXXXX 256 (4x64) Kbytes SA36-SA39 01001XXXXX 256 (4x64) Kbytes SA40-SA43 01010XXXXX 256 (4x64) Kbytes SA44-SA47 01011XXXXX 256 (4x64) Kbytes SA48-SA51 01100XXXXX 256 (4x64) Kbytes SA52-SA55 01101XXXXX 256 (4x64) Kbytes SA56-SA59 01110XXXXX 256 (4x64) Kbytes SA60-SA63 01111XXXXX 256 (4x64) Kbytes SA64-SA67 10000XXXXX 256 (4x64) Kbytes SA68-SA71 10001XXXXX 256 (4x64) Kbytes SA72-SA75 10010XXXXX 256 (4x64) Kbytes SA76-SA79 10011XXXXX 256 (4x64) Kbytes SA80-SA83 10100XXXXX 256 (4x64) Kbytes SA84-SA87 10101XXXXX 256 (4x64) Kbytes SA88-SA91 10110XXXXX 256 (4x64) Kbytes SA92-SA95 10111XXXXX 256 (4x64) Kbytes SA96-SA99 11000XXXXX 256 (4x64) Kbytes SA100-SA103 11001XXXXX 256 (4x64) Kbytes SA104-SA107 11010XXXXX 256 (4x64) Kbytes SA108-SA111 11011XXXXX 256 (4x64) Kbytes SA112-SA115 11100XXXXX 256 (4x64) Kbytes SA116-SA119 11101XXXXX 256 (4x64) Kbytes SA120-SA123 11110XXXXX 256 (4x64) Kbytes SA124-SA126 1111100XXX 1111101XXX 1111110XXX 192 (3x64) Kbytes SA127 1111111000 8 Kbytes SA128 1111111001 8 Kbytes SA129 1111111010 8 Kbytes SA130 1111111011 8 Kbytes SA131 1111111100 8 Kbytes SA132 1111111101 8 Kbytes SA133 1111111110 8 Kbytes SA134 1111111111 8 Kbytes Table 6. Am29LV640MB Bottom Boot Sector Protection Sector A21–A12 Sector/ Sector Block Size SA0 0000000000 8 Kbytes SA1 0000000001 8 Kbytes SA2 0000000010 8 Kbytes SA3 0000000011 8 Kbytes SA4 0000000100 8 Kbytes SA5 0000000101 8 Kbytes SA6 0000000110 8 Kbytes SA7 0000000111 8 Kbytes SA8–SA10 0000001XXX, 0000010XXX, 0000011XXX, 192 (3x64) Kbytes SA11–SA14 00001XXXXX 256 (4x64) Kbytes SA15–SA18 00010XXXXX 256 (4x64) Kbytes SA19–SA22 00011XXXXX 256 (4x64) Kbytes SA23–SA26 00100XXXXX 256 (4x64) Kbytes SA27-SA30 00101XXXXX 256 (4x64) Kbytes SA31-SA34 00110XXXXX 256 (4x64) Kbytes SA35-SA38 00111XXXXX 256 (4x64) Kbytes SA39-SA42 01000XXXXX 256 (4x64) Kbytes SA43-SA46 01001XXXXX 256 (4x64) Kbytes SA47-SA50 01010XXXXX 256 (4x64) Kbytes SA51-SA54 01011XXXXX 256 (4x64) Kbytes Sector A21–A12 Sector/ Sector Block Size |
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