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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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S29AS008J датащи(PDF) 15 Page - Cypress Semiconductor |
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S29AS008J датащи(HTML) 15 Page - Cypress Semiconductor |
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15 / 56 page  Document Number: 002-00870 Rev.*K Page 15 of 56 S29AS008J 7.11 Sector Group Protection/Unprotection The hardware sector group protection feature disables both program and erase operations in any sector group (see Table on page 13 to Table on page 15). The hardware sector group unprotection feature re-enables both program and erase operations in previously protected sector groups. Sector group protection/unprotection can be implemented via two methods. Sector group protection/unprotection requires VID on the RESET# pin only, and can be implemented either in-system or via programming equipment. Figure 7.1 on page 16 shows the algorithms and Figure 18.11 on page 48 shows the timing diagram. This method uses standard microprocessor bus cycle timing. For sector group unprotect, all unprotected sector groups must first be protected prior to the first sector group unprotect write cycle. The device is shipped with all sector groups unprotected. Cypress offers the option of programming and protecting sector groups at its factory prior to shipping the device through Cypress Programming Service. Contact a Cypress representative for details. It is possible to determine whether a sector group is protected or unprotected. See Autoselect Mode on page 11 for details. AS008J Top Boot Device Sector/Sector Group Protection Sector / Sector Block A18 A17 A16 A15 A14 A13 A12 Sector / Sector Block Size SA0-SA3 0 0 XXXXX 256 (4x64) Kbytes SA4-SA7 0 1 XXXXX 256 (4x64) Kbytes SA8-SA11 1 0 XXXXX 256 (4x64) Kbytes SA12-SA13 1 1 0 XXXX 128 (2x64) Kbytes SA14 1110 X X X 64 Kbytes SA15 1111000 8 Kbytes SA16 1111001 8 Kbytes SA17 1111010 8 Kbytes SA18 1111011 8 Kbytes SA19 1111100 8 Kbytes SA20 1111101 8 Kbytes SA21 1111110 8 Kbytes SA22 1111111 8 Kbytes AS008J Bottom Boot Device Sector/Sector Group Protection Sector / Sector Block A18 A17 A16 A15 A14 A13 A12 Sector / Sector Block Size SA0 00 00 000 8 Kbytes SA1 00 00 001 8 Kbytes SA2 00 00 010 8 Kbytes SA3 00 00 011 8 Kbytes SA4 00 00 100 8 Kbytes SA5 00 00 101 8 Kbytes SA6 00 00 110 8 Kbytes SA7 00 00 111 8 Kbytes SA8 0 0 0 1 X X X 64 Kbytes SA9-SA10 0 0 1 X X X X 128 (2x64) Kbytes SA11-SA14 0 1 X X X X X 256 (4x64) Kbytes SA15-SA18 1 0 X X X X X 256 (4x64) Kbytes SA19-SA22 1 1 X X X X X 256 (4x64) Kbytes |
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