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| 型号： | A82DL1642TG-70IF |
| 厂商： | AMIC Technology Corporation |
| 英文描述： | Stacked Multi-Chip Package (MCP) Flash Memory and SRAM, A82DL16x2T(U) 16 Megabit (2Mx8 Bit/1Mx16 Bit) CMOS 3.3 Volt-only, Simultaneous Operation Flash |
| 中文描述： | 堆叠式多芯片封装（MCP）闪存和SRAM，A82DL16x2T（ü）16兆位（2Mx8 Bit/1Mx16位）的CMOS 3.3伏只，同时闪电行动 |
| 文件页数： | 16/57页 |
| 文件大小： | 883K |
| 代理商： | A82DL1642TG-70IF |
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A82DL16x2T(U) Series
PRELIMINARY
(May, 2005, Version 0.1)
15
AMIC Technology, Corp.
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 6 and 7).
Table 6. Top Boot Sector/Sector Block Addresses for
Protection/Unprotection
Sector /
Sector Block
SA0
A19–A12
Sector / Sector Block Size
00000XXX
00001XXX,
00010XXX,
00011XXX
001XXXXX
64 Kbytes
SA1-SA3
192 (3x64) Kbytes
SA4-SA7
256 (4x64) Kbytes
SA8-SA11
SA12-SA15
SA16-SA19
010XXXXX
011XXXXX
100XXXXX
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
SA20-SA23
SA24-SA27
101XXXXX
110XXXXX
11100XXX,
11101XXX,
11110XXX
11111000
11111001
11111010
256 (4x64) Kbytes
256 (4x64) Kbytes
SA28-SA30
192 (3x64) Kbytes
SA31
SA32
SA33
8 Kbytes
8 Kbytes
8 Kbytes
SA34
SA35
SA36
11111011
11111100
11111101
8 Kbytes
8 Kbytes
8 Kbytes
SA37
SA38
11111110
11111111
8 Kbytes
8 Kbytes
Table 7. Bottom Boot Sector/Sector Block Addresses for
Protection/Unprotection
Sector /
Sector Block
SA38
A19–A12
Sector / Sector Block Size
11111XXX
11110XXX,
11101XXX,
11100XXX
110XXXXX
101XXXXX
64 Kbytes
SA37-SA35
192 (3x64) Kbytes
SA34-SA31
SA30-SA27
256 (4x64) Kbytes
256 (4x64) Kbytes
SA26-SA23
SA22-SA19
SA18-SA15
100XXXXX
011XXXXX
010XXXXX
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
SA14-SA11
001XXXXX
00001XXX,
00010XXX,
00011XXX
00000111
256 (4x64) Kbytes
SA10-SA8
192 (3x64) Kbytes
SA7
8 Kbytes
SA6
SA5
SA4
00000110
00000101
00000100
8 Kbytes
8 Kbytes
8 Kbytes
SA3
SA2
SA1
SA0
00000011
00000010
00000001
00000000
8 Kbytes
8 Kbytes
8 Kbytes
8 Kbytes
The hardware sector protection feature disables both
program and erase operations in any sector. The hardware
sector unprotection feature re-enables both program and
erase operations in previously protected sectors. Sector
protection and unprotection can be implemented 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 2 shows the algorithms and
Figure 23 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.
The sector unprotect algorithm unprotects all sectors in
parallel. All previously protected sectors must be individually
re-protected. To change data in protected sectors efficiently,
the temporary sector unprotect function is available. See
“Temporary Sector/Sector Block Unprotect”.
The alternate method for protection and unprotection is by
software temporary sector /sector block unprotect command.
See Figure 2 for Command Flow.
The device is shipped with all sectors unprotected.
It is possible to determine whether a sector is protected or
unprotected. See the Autoselect Mode section for details.
Write Protect (
WP
/
ACC)
The Write Protect function provides a hardware method of
protecting certain boot sectors without using V
ID
. This
function is one of two provided by the
WP
/ACC pin.
If the system asserts V
IL
on the
WP
/ACC pin, the device
disables program and erase functions in the two “outermost”
8 Kbyte boot sectors independently of whether those sectors
were protected or unprotected using the method described in
“Sector/Sector Block Protection and Unprotection”. The two
outermost 8 Kbyte boot sectors are the two sectors
containing the lowest addresses in a bottom-boot-configured
device, or the two sectors containing the highest addresses
in a top-boot-configured device.
If the system asserts V
IH
on the
WP
/ACC pin, the device
reverts to whether the two outermost 8 Kbyte 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/Sector Block Protection and
Unprotection”.
Note that the
WP
/ACC pin must not be left floating or
unconnected; inconsistent behavior of the device may result.
Temporary Sector/Sector Block Unprotect
(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 6 and 7).
This feature allows temporary unprotection of previously
protected sectors to change data in-system. The Sector
Unprotect mode is activated by setting the
RESET
pin to V
ID
(8.5V-12.5V). During this mode, formerly protected sectors
can be programmed or erased by selecting the sector
addresses. Once V
ID
is removed from the
RESET
pin, all the
previously protected sectors are protected again. Figure 1
shows the algorithm, and Figure 22 shows the timing
diagrams, for this feature.
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相关代理商/技术参数 |
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|---|---|
| A82DL1642TG-70U | 制造商:AMICC 制造商全称:AMIC Technology 功能描述:Stacked Multi-Chip Package (MCP) Flash Memory and SRAM, A82DL16x2T(U) 16 Megabit (2Mx8 Bit/1Mx16 Bit) CMOS 3.3 Volt-only, Simultaneous Operation Flash |
| A82DL1642TG-70UF | 制造商:AMICC 制造商全称:AMIC Technology 功能描述:Stacked Multi-Chip Package (MCP) Flash Memory and SRAM, A82DL16x2T(U) 16 Megabit (2Mx8 Bit/1Mx16 Bit) CMOS 3.3 Volt-only, Simultaneous Operation Flash |
| A82DL1642UG-70 | 制造商:AMICC 制造商全称:AMIC Technology 功能描述:Stacked Multi-Chip Package (MCP) Flash Memory and SRAM, A82DL16x2T(U) 16 Megabit (2Mx8 Bit/1Mx16 Bit) CMOS 3.3 Volt-only, Simultaneous Operation Flash |
| A82DL1642UG-70F | 制造商:AMICC 制造商全称:AMIC Technology 功能描述:Stacked Multi-Chip Package (MCP) Flash Memory and SRAM, A82DL16x2T(U) 16 Megabit (2Mx8 Bit/1Mx16 Bit) CMOS 3.3 Volt-only, Simultaneous Operation Flash |
| A82DL1642UG-70I | 制造商:AMICC 制造商全称:AMIC Technology 功能描述:Stacked Multi-Chip Package (MCP) Flash Memory and SRAM, A82DL16x2T(U) 16 Megabit (2Mx8 Bit/1Mx16 Bit) CMOS 3.3 Volt-only, Simultaneous Operation Flash |
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