欢迎访问ic37.com |
会员登录 免费注册
发布采购

S29GL064M90FFIR10 参数 Datasheet PDF下载

S29GL064M90FFIR10图片预览
型号: S29GL064M90FFIR10
PDF下载: 下载PDF文件 查看货源
内容描述: 3.0伏只页面模式闪存具有0.23微米的MirrorBit制程技术 [3.0 Volt-only Page Mode Flash Memory featuring 0.23 um MirrorBit process technology]
分类和应用: 闪存存储内存集成电路
文件页数/大小: 160 页 / 4686 K
品牌: SPANSION [ SPANSION ]
 浏览型号S29GL064M90FFIR10的Datasheet PDF文件第92页浏览型号S29GL064M90FFIR10的Datasheet PDF文件第93页浏览型号S29GL064M90FFIR10的Datasheet PDF文件第94页浏览型号S29GL064M90FFIR10的Datasheet PDF文件第95页浏览型号S29GL064M90FFIR10的Datasheet PDF文件第97页浏览型号S29GL064M90FFIR10的Datasheet PDF文件第98页浏览型号S29GL064M90FFIR10的Datasheet PDF文件第99页浏览型号S29GL064M90FFIR10的Datasheet PDF文件第100页  
P r e l i m i n a r y  
SecSi (Secured Silicon) Sector Flash Memory Region  
The SecSi (Secured Silicon) Sector feature provides a Flash memory region that  
enables permanent part identification through an Electronic Serial Number  
(ESN). The SecSi Sector is 256 bytes in length, and uses a SecSi Sector Indicator  
Bit (DQ7) to indicate whether or not the SecSi Sector is locked when shipped from  
the factory. This bit is permanently set at the factory and cannot be changed,  
which prevents cloning of a factory locked part. This ensures the security of the  
ESN once the product is shipped to the field.  
The factory offers the device with the SecSi Sector either customer lockable  
(standard shipping option) or factory locked (contact a Spansion sales represen-  
tative for ordering information). The customer-lockable version is shipped with  
the SecSi Sector unprotected, allowing customers to program the sector after re-  
ceiving the device. The customer-lockable version also has the SecSi Sector  
Indicator Bit permanently set to a “0.The factory-locked version is always pro-  
tected when shipped from the factory, and has the SecSi (Secured Silicon) Sector  
Indicator Bit permanently set to a “1.Thus, the SecSi Sector Indicator Bit pre-  
vents customer-lockable devices from being used to replace devices that are  
factory locked. Note that the ACC function and unlock bypass modes are not  
available when the SecSi Sector is enabled.  
The SecSi sector address space in this device is allocated as follows:  
SecSi Sector Address  
Range  
ExpressFlash  
Factory Locked  
Customer Lockable ESN Factory Locked  
ESN or determined by  
customer  
000000h–000007h  
000008h–00007Fh  
ESN  
Determined by  
customer  
Determined by  
customer  
Unavailable  
The system accesses the SecSi Sector through a command sequence (see “Write  
Protect (WP#)”). After the system has written the Enter SecSi Sector command  
sequence, it may read the SecSi Sector by using the addresses normally occupied  
by the first sector (SA0). This mode of operation continues until the system issues  
the Exit SecSi Sector command sequence, or until power is removed from the de-  
vice. On power-up, or following a hardware reset, the device reverts to sending  
commands to sector SA0.  
Customer Lockable: SecSi Sector NOT Programmed or Protected  
At the Factory  
Unless otherwise specified, the device is shipped such that the customer may  
program and protect the 256-byte SecSi sector.  
The system may program the SecSi Sector using the write-buffer, accelerated  
and/or unlock bypass methods, in addition to the standard programming com-  
mand sequence. See Command Definitions.  
Programming and protecting the SecSi Sector must be used with caution since,  
once protected, there is no procedure available for unprotecting the SecSi Sector  
area and none of the bits in the SecSi Sector memory space can be modified in  
any way.  
The SecSi Sector area can be protected using one of the following procedures:  
„ Write the three-cycle Enter SecSi Sector Region command sequence, and  
then follow the in-system sector protect algorithm as shown in Figure 2, ex-  
cept that RESET# may be at either V or V . This allows in-system protec-  
IH  
ID  
96  
S29GLxxxM MirrorBitTM Flash Family  
S29GLxxxM_00A5 April 30, 2004