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S29AL008D70TAI020 参数 Datasheet PDF下载

S29AL008D70TAI020图片预览
型号: S29AL008D70TAI020
PDF下载: 下载PDF文件 查看货源
内容描述: 8兆位( 1一M× 8位/ 512的K× 16位) CMOS 3.0伏只引导扇区闪存 [8 Megabit (1 M x 8-Bit/512 K x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory]
分类和应用: 闪存内存集成电路光电二极管
文件页数/大小: 55 页 / 1519 K
品牌: SPANSION [ SPANSION ]
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D a t a S h e e t  
Table 4. S29AL008D Autoselect Codes (High Voltage Method)  
A18 A11  
to to  
Mode CE# OE# WE# A12 A10 A9  
A8  
to  
A7  
A5  
to  
A2  
DQ8  
to  
A0 DQ15  
DQ7  
to  
DQ0  
Description  
A6  
A1  
Manufacturer ID  
:
Spansion  
Word  
L
L
L
L
H
H
X
X
VID  
X
L
X
L
L
X
01h  
DAh  
Device ID:  
22h  
Am29LV800B  
(Top Boot Block)  
X
X
VID  
X
L
L
X
L
L
H
Byte  
L
L
L
L
H
H
X
DAh  
5Bh  
Device ID:  
Am29LV800B  
(Bottom Boot  
Block)  
Word  
22h  
X
X
X
VID  
X
X
X
X
H
L
Byte  
L
L
H
X
X
5Bh  
01h  
(protected)  
Sector Protection  
Verification  
L
L
H
SA  
VID  
L
H
00h  
(unprotected  
)
X
L = Logic Low = VIL, H = Logic High = VIH, SA = Sector Address, X = Don’t care.  
Sector Protection/Unprotection  
The hardware sector protection feature disables both program and erase opera-  
tions in any sector. The hardware sector unprotection feature re-enables both  
program and erase operations in previously protected sectors.  
The device is shipped with all sectors unprotected. Spansion offers the option of  
programming and protecting sectors at its factory prior to shipping the device  
through Spansion’s ExpressFlash™ Service. Contact an Spansion representative  
for details.  
It is possible to determine whether a sector is protected or unprotected. See  
Autoselect Mode, on page 15 for details.  
Sector Protection/unprotection can be implemented via two methods.  
The primary method requires V on the RESET# pin only, and can be imple-  
ID  
mented either in-system or via programming equipment. Figure 2, on page 18  
shows the algorithms and Figure 23, on page 47 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 on  
ID  
address pin A9 and OE#. This method is compatible with programmer routines  
written for earlier 3.0 volt-only Spansion flash devices. Publication number 20536  
contains further details; contact an Spansion representative to request a copy.  
Temporary Sector Unprotect  
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 . During this mode, formerly protected sectors can be pro-  
ID  
grammed or erased by selecting the sector addresses. Once V is removed from  
ID  
the RESET# pin, all the previously protected sectors are protected again.  
16  
S29AL008D  
S29AL008D_00A3 June 16, 2005