am42dl1614dt70it Meet Spansion Inc., am42dl1614dt70it Datasheet - Page 18

• Manufacturer Part Number: am42dl1614dt70it
• Description: 16 Mbit X8/x16 Flash And 4 Mbit X16 Static Ram Preliminary
• Manufacturer: Meet Spansion Inc.

Autoselect Mode
The autoselect mode provides manufacturer and de-
vice identification, and sector protection verification,
through identifier codes output on DQ7–DQ0. The au-
toselect codes can be accessed in-system through the
command register. Refer to the Autoselect Command
Sequence section for more information.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
January 9, 2002
Sector / Sector
SA12-SA15
SA16-SA19
SA20-SA23
SA24-SA27
SA28-SA30
SA8-SA11
SA1-SA3
SA4-SA7
Block
SA31
SA32
SA33
SA34
SA35
SA36
SA37
SA38
SA0
for Protection/Unprotection
00001XXX,
00010XXX,
001XXXXX
010XXXXX
011XXXXX
100XXXXX
101XXXXX
110XXXXX
00000XXX
11100XXX,
11101XXX,
00011XXX
11110XXX
A19–A12
11111000
11111001
11111010
11111011
11111100
11111101
11111110
11111111
Sector / Sector Block Size
192 (3x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
192 (3x64) Kbytes
64 Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
P R E L I M I N A R Y
Am42DL16x4D
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 as follows.
Sector protection/unprotection requires V
SET# pin only, and can be implem ented eith er
in-system or via programming equipment. Figure 2
shows the algorithms and Figure 26 shows the timing
diagram. This method uses standard microprocessor
bus cycle timing. For sector unprotect, all unprotected
sectors must first be protected prior to the first sector
unprotect write cycle. Note that the sector unprotect
algorithm unprotects all sectors in parallel. All previ-
o u s l y p ro t e c t e d s e c t o rs m u s t b e in d i v id u a ll y
re-protected. To change data in protected sectors effi-
ciently, the temporary sector un protect function is
available. See “Temporary Sector/Sector Block
Unprotect”.
The device is shipped with all sectors unprotected.
It is possible to determine whether a sector is pro-
tected or unprotected. See the Autoselect Mode
section for details.
Write Protect (WP#)
The Write Protect function provides a hardware
method of protecting certain boot sectors without
using V
WP#/ACC pin.
Sector / Sector
Table 9. Bottom Boot Sector/Sector Block
SA37-SA35
SA34-SA31
SA30-SA27
SA26-SA23
SA22-SA19
SA18-SA15
SA14-SA11
SA10-SA8
Addresses for Protection/Unprotection
Block
SA38
SA7
SA6
SA5
SA4
SA3
SA2
SA1
SA0
ID
. This function is one of two provided by the
101XXXXX
100XXXXX
010XXXXX
001XXXXX
11101XXX,
110XXXXX
011XXXXX
00001XXX,
00010XXX,
11110XXX,
00011XXX
11100XXX
11111XXX
00000110
00000101
00000100
00000011
00000010
00000001
00000000
A19–A12
00000111
Sector / Sector Block Size
192 (3x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
192 (3x64) Kbytes
64 Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
ID
on the RE-
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