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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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AM29LV128ML93RPCF Datenblatt(PDF) 21 Page - Advanced Micro Devices |
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AM29LV128ML93RPCF Datenblatt(HTML) 21 Page - Advanced Micro Devices |
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21 / 66 page  January 31, 2007 25270C7 Am29LV128MH/L 21 D A TA SH EET Sector Group Protection and Unprotection The hardware sector group protection feature disables both program and erase operations in any sector group. The hardware sector group unprotection fea- ture re-enables both program and erase operations in previously protected sector groups. Sector group pro- tection/unprotection can be implemented via two methods. Sector group protection/unprotection requires V ID on the RESET# pin only, and can be implemented either in-system or via programming equipment. Figure 2 shows the algorithms and Figure 25 shows the timing diagram. This method uses standard microprocessor bus cycle timing. For sector group unprotect, all unpro- tected sector group 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 20 for details. Table 4. Sector Group Protection/Unprotection Address Table Sector Group A22–A15 SA0 00000000 SA1 00000001 SA2 00000010 SA3 00000011 SA4–SA7 000001xx SA8–SA11 000010xx SA12–SA15 000011xx SA16–SA19 000100xx SA20–SA23 000101xx SA24–SA27 000110xx SA28–SA31 000111xx SA32–SA35 001000xx SA36–SA39 001001xx SA40–SA43 001010xx SA44–SA47 001011xx SA48–SA51 001100xx SA52–SA55 001101xx SA56–SA59 001110xx SA60–SA63 001111xx SA64–SA67 010000xx SA68–SA71 010001xx SA72–SA75 010010xx SA76–SA79 010011xx SA80–SA83 010100xx SA84–SA87 010101xx SA88–SA91 010110xx SA92–SA95 010111xx SA96–SA99 011000xx SA100–SA103 011001xx SA104–SA107 011010xx SA108–SA111 011011xx SA112–SA115 011100xx SA116–SA119 011101xx SA120–SA123 011110xx SA124–SA127 011111xx SA128–SA131 100000xx SA132–SA135 100001xx SA136–SA139 100010xx SA140–SA143 100011xx SA144–SA147 100100xx SA148–SA151 100101xx SA152–SA155 100110xx SA156–SA159 100111xx SA160–SA163 101000xx SA164–SA167 101001xx SA168–SA171 101010xx SA172–SA175 101011xx SA176–SA179 101100xx SA180–SA183 101101xx SA184–SA187 101110xx SA188–SA191 101111xx SA192–SA195 110000xx SA196–SA199 110001xx SA200–SA203 110010xx SA204–SA207 110011xx SA208–SA211 110100xx SA212–SA215 110101xx SA216–SA219 110110xx SA220–SA223 110111xx SA224–SA227 111000xx SA228–SA231 111001xx SA232–SA235 111010xx SA236–SA239 111011xx SA240–SA243 111100xx SA244–SA247 111101xx SA248–SA251 111110xx SA252 11111100 SA253 11111101 SA254 11111110 SA255 11111111 Sector Group A22–A15 |
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