AM29PDS322D datasheet(18/51 Pages) AMD

18 / 51 page

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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