D A T A
S H E E T
Table 9. Bottom Boot Sector/Sector Block
Addresses for Protection/Unprotection
Sector
SA70
SA69-SA67
SA66-SA63
SA62-SA59
SA58-SA55
SA54-SA51
SA50-SA47
SA46-SA43
A20–A12
111111XXX
111110XXX,
111101XXX,
111100XXX
1110XXXXX
1101XXXXX
1100XXXXX
1011XXXXX
1010XXXXX
1001XXXXX
1000XXXXX
0111XXXXX
0110XXXXX
0101XXXXX
0100XXXXX
0011XXXXX
0010XXXXX
0001XXXXX
000011XXX,
000010XXX,
000001XXX
000000111
000000110
000000101
000000100
000000011
000000010
000000001
000000000
Sector/Sector Block
Size
64 Kbytes
192 (3x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
192 (3x64) Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
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).
The hardware sector protection feature disables both
program and erase operations in any sector. The hard-
ware sector unprotection feature re-enables both pro-
gram and erase operations in previously protected
sectors. Sector protection/unprotection can be imple-
mented via two methods.
Table 8.
Top Boot Sector/Sector Block Addresses
for Protection/Unprotection
A20–A12
000000XXX
000001XXX,
000010XXX
000011XXX
0001XXXXX
0010XXXXX
0011XXXXX
0100XXXXX
0101XXXXX
0110XXXXX
0111XXXXX
1000XXXXX
1001XXXXX
1010XXXXX
1011XXXXX
1100XXXXX
1101XXXXX
1110XXXXX
111100XXX,
111101XXX,
111110XXX
111111000
111111001
111111010
111111011
111111100
111111101
111111110
111111111
Sector/
Sector Block Size
64 Kbytes
192 (3x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
192 (3x64) Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
SA42-SA39
SA38-SA35
SA34-SA31
SA30-SA27
SA26-SA23
SA22–SA19
SA18-SA15
SA14-SA11
SA10-SA8
SA7
SA6
SA5
SA4
SA3
SA2
SA1
SA0
Sector
SA0
SA1-SA3
SA4-SA7
SA8-SA11
SA12-SA15
SA16-SA19
SA20-SA23
SA24-SA27
SA28-SA31
SA32-SA35
SA36-SA39
SA40-SA43
SA44-SA47
SA48-SA51
SA52-SA55
SA56-SA59
SA60-SA62
SA63
SA64
SA65
SA66
SA67
SA68
SA69
SA70
Sector protection/unprotection requires V
ID
on the RE-
SET# pin only, and can be implemented either in-sys-
tem or via programming equipment. Figure 2 shows
the algorithms and Figure 25 shows the timing dia-
gram. This method uses standard microprocessor bus
cycle timing. For sector unprotect, all unprotected sec-
tors must first be protected prior to the first sector un-
protect write cycle.
The sector unprotect algorithm unprotects all sectors
in parallel. All previously protected sectors must be in-
dividually re-protected. To change data in protected
sectors efficiently, the temporary sector unprotect
function is available. See “Temporary Sector Unpro-
The device is shipped with all sectors unprotected.
AMD offers the option of programming and protecting
sectors at its factory prior to shipping the device
through AMD’s ExpressFlash™ Service. Contact an
AMD representative for details.
18
Am29DL32xG
25686B10 December 4, 2006
SPANSION [ SPANSION ]
