參數(shù)資料
型號(hào)： AM29SL160CT-120WCC
英文描述： 10MS, DBGA2, IND TEMP, GREEN, 1.8V(SERIAL EE)
中文描述： x8/x16閃存EEPROM
文件頁(yè)數(shù)： 16/50頁(yè)
文件大?。?/td> 979K
代理商： AM29SL160CT-120WCC
16
Am29SL160C
The primary method requires V
ID
on the RESET# pin
only, and can be implemented either in-system or via
programming equipment. Figure 1 shows the algo-
rithms and Figure 24 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 alternate method intended only for programming
equipment requires V
ID
on address pin A9 and OE#.
This method is compatible with programmer routines
written for earlier 3.0 volt-only AMD flash devices. Pub-
lication number 21622 contains further details. Contact
an AMD representative to request the document con-
taining further details.
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.
It is possible to determine whether a sector is protected
or unprotected. See “Autoselect Mode” 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
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 Protection/
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-config-
ured 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 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 Protection/Unprotection.”
Note that if the system asserts V
HH
on the WP#/ACC
pin, all sectors, including the two outermost sectors,
will be unprotected. V
HH
is intended for accelerated in-
system programming of the device during system pro-
duction. It is advisable, therefore, not to assert V
HH
on
this pin after the system has been placed in the field for
use. If faster programming is desired, the system may
use the unlock bypass program command sequence.
Temporary Sector Unprotect
This feature allows temporary unprotection of previ-
ously protected sectors to change data in-system. The
Sector Unprotect mode is activated by setting the
RESET# pin to V
ID
. During this mode, formerly pro-
tected 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 2 shows the algo-
rithm, and Figure 22 shows the timing diagrams, for this
feature.
相關(guān)PDF資料
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AM29SL160CT-150EI 8 ULTRA THIN,MINI MAP,PB/HALO FREE,IND T(SERIAL EE)
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