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18 / 51 page 16 Am29PDS322D 23569A5 December 4, 2006 D A TA SH EE T 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). Table 8. Top Boot Sector/Sector Block Addresses for Protection/Unprotection Table 9. Bottom Boot Sector/Sector Block Addresses for Protection/Unprotection 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 and unprotection can be im- plemented via two methods. The primary method requires V ID on the RESET# pin only, and can be implemented either in-system or via programming equipment. Figure 3 shows the algo- rithms and Figure 26 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. Sector Group Sectors A20–A12 Sector/ Sector Block Size SGA0 SA0 000000XXX 64 (1x64) Kbytes SGA1 SA1–SA3 00001XXXX 192 (3x64) Kbytes SGA2 SA4–SA7 0001XXXXX 256 (4x64) Kbytes SGA3 SA8–SA11 0010XXXXX 256 (4x64) Kbytes SGA4 SA12–SA15 0011XXXXX 256 (4x64) Kbytes SGA5 SA16–SA19 0100XXXXX 256 (4x64) Kbytes SGA6 SA20–SA23 0101XXXXX 256 (4x64) Kbytes SGA7 SA24–SA27 0110XXXXX 256 (4x64) Kbytes SGA8 SA28–SA31 0111XXXXX 256 (4x64) Kbytes SGA9 SA32–SA35 1000XXXXX 256 (4x64) Kbytes SGA10 SA36–SA39 1001XXXXX 256 (4x64) Kbytes SGA11 SA40–SA43 1010XXXXX 256 (4x64) Kbytes SGA12 SA44–SA47 1011XXXXX 256 (4x64) Kbytes SGA13 SA48–SA51 1100XXXXX 256 (4x64) Kbytes SGA14 SA52–SA55 1101XXXXX 256 (4x64) Kbytes SGA15 SA56–SA59 1110XXXXX 256 (4x64) Kbytes SGA16 SA60–SA62 111100XXX 192 (3x64) Kbytes SGA17 SA63 111111000 8 Kbytes SGA18 SA64 111111001 8 Kbytes SGA19 SA65 111111010 8 Kbytes SGA20 SA66 111111011 8 Kbytes SGA21 SA67 111111100 8 Kbytes SGA22 SA68 111111101 8 Kbytes SGA23 SA69 111111110 8 Kbytes SGA24 SA70 111111111 8 Kbytes Sector Group Sectors A20–A12 Sector/Sector Block Size SGA0 SA70 111111XXX 64 (1x64) Kbytes SGA1 SA69–SA67 11110XXXX 192 (3x64) Kbytes SGA2 SA66–SA63 1110XXXXX 256 (4x64) Kbytes SGA3 SA62–SA59 1101XXXXX 256 (4x64) Kbytes SGA4 SA58–SA55 1100XXXXX 256 (4x64) Kbytes SGA5 SA54–SA51 1011XXXXX 256 (4x64) Kbytes SGA6 SA50–SA47 1010XXXXX 256 (4x64) Kbytes SGA7 SA46–SA43 1001XXXXX 256 (4x64) Kbytes SGA8 SA42–SA39 1000XXXXX 256 (4x64) Kbytes SGA9 SA38–SA35 0111XXXXX 256 (4x64) Kbytes SGA10 SA34–SA31 0110XXXXX 256 (4x64) Kbytes SGA11 SA30–SA27 0101XXXXX 256 (4x64) Kbytes SGA12 SA26–SA23 0100XXXXX 256 (4x64) Kbytes SGA13 SA22–SA19 0011XXXXX 256 (4x64) Kbytes SGA14 SA18–SA15 0010XXXXX 256 (4x64) Kbytes SGA15 SA14–SA11 0001XXXXX 256 (4x64) Kbytes SGA16 SA10–SA8 000011XXX 192 (3x64) Kbytes SGA17 SA7 000000111 8 Kbytes SGA18 SA6 000000110 8 Kbytes SGA19 SA5 000000101 8 Kbytes SGA20 SA4 000000100 8 Kbytes SGA21 SA3 000000011 8 Kbytes SGA22 SA2 000000010 8 Kbytes SGA23 SA1 000000001 8 Kbytes SGA24 SA0 000000000 8 Kbytes |
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