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AM29DL164DB90VRF 参数 Datasheet PDF下载

AM29DL164DB90VRF图片预览
型号: AM29DL164DB90VRF
PDF下载: 下载PDF文件 查看货源
内容描述: [Flash, 1MX16, 90ns, PBGA48, 8.15 X 6.15 MM, 0.80 MM PITCH, LEAD FREE, VBGA-48]
分类和应用: 内存集成电路闪存
文件页数/大小: 57 页 / 1243 K
品牌: SPANSION [ SPANSION ]
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D A T A S H E E T  
through AMD’s ExpressFlash™ Service. Contact an  
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 VID (8.5 V – 12.5 V). During this mode,  
formerly protected sectors can be programmed or  
erased by selecting the sector addresses. Once VID is  
removed 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.  
AMD representative for details.  
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 VID. This function is one of two provided by the  
WP#/ACC pin.  
If the system asserts VIL 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.  
START  
RESET# = VID  
(Note 1)  
Perform Erase or  
Program Operations  
If the system asserts VIH on the WP#/ACC pin, the de-  
vice 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 “Sec-  
tor/Sector Block Protection and Unprotection”.  
RESET# = VIH  
Temporary Sector  
Unprotect Completed  
(Note 2)  
Note that the WP#/ACC pin must not be left floating or  
unconnected; inconsistent behavior of the device may  
result.  
Notes:  
1. All protected sectors unprotected (If WP#/ACC = VIL,  
Temporary Sector/Sector Block Unprotect  
outermost boot sectors will remain protected).  
(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).  
2. All previously protected sectors are protected once  
again.  
Figure 1. Temporary Sector Unprotect Operation  
February 26, 2009 21533E6  
Am29DL16xD  
19  
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