A d v a n c e I n f o r m a t i o n
Table 11. Sector Block Addresses for Protection/Unprotection — Model 04
Sector / Sector Block
A20–A12
Sector/Sector Block Size
111111XXX,
111110XXX,
111101XXX,
111100XXX
SA70-SA67
256 (4x64) Kbytes
SA66-SA63
SA62-SA59
SA58-SA55
SA54-SA51
SA50-SA47
SA46-SA43
SA42-SA39
SA38-SA35
SA34-SA31
SA30-SA27
SA26-SA23
SA22–SA19
SA18-SA15
SA14-SA11
1110XXXXX
1101XXXXX
1100XXXXX
1011XXXXX
1010XXXXX
1001XXXXX
1000XXXXX
0111XXXXX
0110XXXXX
0101XXXXX
0100XXXXX
0011XXXXX
0010XXXXX
0001XXXXX
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
000011XXX,
000010XXX,
000001XXX
SA10-SA8
192 (3x64) Kbytes
SA7
SA6
SA5
SA4
SA3
SA2
SA1
SA0
000000111
000000110
000000101
000000100
000000011
000000010
000000001
000000000
8 Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
Write Protect (WP#) — Models 03, 04 Only
The Write Protect function provides a hardware method of protecting certain boot sectors without
using V . This function is one of two provided by the WP#/ACC pin.
ID
If the system asserts V on the WP#/ACC pin, the device disables program and erase functions
IL
in the two outermost 8 Kbyte boot sectors independently of whether those sectors were protected
or unprotected using the method described in Sector Protection/Unprotection on page 20. The
two outermost 8 Kbyte boot sectors are the two sectors containing the lowest addresses in a bot-
tom-boot-configured device, or the two sectors containing the highest addresses in a top-boot-
configured device.
If the system asserts V on the WP#/ACC pin, the device reverts to whether the two outermost
IH
8K Byte boot sectors were last set to be protected or unprotected. That is, sector protection or
unprotection for these two sectors depends on whether they were last protected or unprotected
using the method described in Sector Protection/Unprotection on page 20.
Note that the WP#/ACC pin must not be left floating or unconnected; inconsistent behavior of the
device may result.
June 13, 2005 S29AL032D_00_A3
S29AL032D
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