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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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S29AS016J датащи(PDF) 16 Page - Cypress Semiconductor |
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S29AS016J датащи(HTML) 16 Page - Cypress Semiconductor |
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16 / 59 page  Document Number: 002-01122 Rev.*L Page 16 of 59 S29AS016J Note Address range is A19:A-1 in byte mode and A19:A0 in word mode. See the Word/Byte Configuration on page 11. 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 17). 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 18 shows the algorithms and Figure 18.1 on page 44 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 12 for details. SA37 1 1 1 1 0 X X X 64/32 1E0000–1EFFFF F0000–F7FFF SA38 1 1 1 1 1 X X X 64/32 1F0000–1FFFFF F8000–FFFFF AS016J Top Boot Device Sector/Sector Group Protection Sector / Sector Block A19 A18 A17 A16 A15 A14 A13 A12 Sector / Sector Block Size SA0-SA3 0 0 0 XXXXX 256 (4x64) Kbytes SA4-SA7 0 0 1 XXXXX 256 (4x64) Kbytes SA8-SA11 0 1 0 XXXXX 256 (4x64) Kbytes SA12-SA15 0 1 1 XXXXX 256 (4x64) Kbytes SA16-SA19 1 0 0 XXXXX 256 (4x64) Kbytes SA20-SA23 1 0 1 XXXXX 256 (4x64) Kbytes SA24-SA27 1 1 0 XXXXX 256 (4x64) Kbytes SA28-SA29 1110 XXXX 128 (2x64) Kbytes SA30 11110 X X X 64 Kbytes SA31 11111000 8 Kbytes SA32 11111001 8 Kbytes SA33 11111010 8 Kbytes SA34 11111011 8 Kbytes SA35 11111100 8 Kbytes SA36 11111101 8 Kbytes SA37 11111110 8 Kbytes SA38 11111111 8 Kbytes Sector Address Tables (Bottom Boot Device) Sector A19A18 A17A16 A15A14 A13A12 Sector Size (Kbytes/Kwords) Address Range (in hexadecimal) Byte Mode (x8) Word Mode (x16) |
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