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| 型號： | AM29DL323GB120EI |
| 廠商： | SPANSION LLC |
| 元件分類： | DRAM |
| 英文描述： | 32 Megabit (4 M x 8-Bit/2 M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory |
| 中文描述： | 2M X 16 FLASH 3V PROM, 120 ns, PDSO48 |
| 封裝： | MO-142DD, TSOP-48 |
| 文件頁數(shù)： | 21/58頁 |
| 文件大?。?/td> | 875K |
| 代理商： | AM29DL323GB120EI |
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December4,2006 25686B10
Am29DL32xG
19
D A T A S H E E T
It is possible to determine whether a sector is pro-
tected or unprotected. See the Autoselect Mode sec-
tion for details.
Write Protect (WP#)
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 de-
vice 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 de-
vice reverts to whether the two outermost 8K Byte
boot sectors were last set to be protected or unpro-
tected. 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 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
8 and 9).
This feature allows temporary unprotection of previ-
ously protected sectors to change data in-system. The
Sector Unprotect mode is activated by setting the RE-
SET# pin to V
ID
(8.5 V – 12.5 V). During this mode, for-
merly protected sectors can be programmed or erased
by selecting the sector addresses. Once V
ID
is re-
moved from the RESET# pin, all the previously pro-
tected sectors are protected again. Figure 1 shows the
algorithm, and Figure 24 shows the timing diagrams,
for this feature.
Figure 1.
Temporary Sector Unprotect Operation
START
Perform Erase or
Program Operations
RESET# = V
IH
Temporary Sector
Unprotect Completed
(Note 2)
RESET# = V
ID
(Note 1)
Notes:
1. All protected sectors unprotected (If WP#/ACC = V
IL
,
outermost boot sectors will remain protected).
2. All previously protected sectors are protected once
again.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AM29DL323GB120EIN | 32 Megabit (4 M x 8-Bit/2 M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory |
| AM29DL323GB120WMF | 32 Megabit (4 M x 8-Bit/2 M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory |
| AM29DL323GB120WMI | 32 Megabit (4 M x 8-Bit/2 M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory |
| AM29DL323GB40PCF | 32 Megabit (4 M x 8-Bit/2 M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory |
| AM29DL323GB40PCFN | 32 Megabit (4 M x 8-Bit/2 M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AM29DL323GB120WDI | 制造商:Advanced Micro Devices 功能描述:Flash Mem Parallel 3.3V 32M-Bit 4M x 8/2M x 16 120ns 63-Pin FBGA |
| AM29DL323GB70EI | 制造商:Advanced Micro Devices 功能描述:Flash Mem Parallel 3.3V 32M-Bit 4M x 8/2M x 16 70ns 48-Pin TSOP |
| AM29DL323GB70WMI | 制造商:Advanced Micro Devices 功能描述:2M X 16 FLASH 3V PROM, 70 ns, PBGA48 |
| AM29DL323GB90EI | 制造商:Advanced Micro Devices 功能描述:Flash Mem Parallel 3V/3.3V 32M-Bit 4M x 8/2M x 16 90ns 48-Pin TSOP 制造商:Advanced Micro Devices 功能描述:NOR Flash, 2M x 16, 48 Pin, Plastic, TSSOP |
| AM29DL323GT120WDI | 制造商:Advanced Micro Devices 功能描述:Flash Mem Parallel 3V/3.3V 32M-Bit 4M x 8/2M x 16 120ns 63-Pin FBGA |
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