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ES29F320D-90WCI 参数 Datasheet PDF下载

ES29F320D-90WCI图片预览
型号: ES29F320D-90WCI
PDF下载: 下载PDF文件 查看货源
内容描述: 32兆( 4M ×8 / 2M ×16 )的CMOS 3.0伏只,引导扇区闪存 [32Mbit(4M x 8/2M x 16) CMOS 3.0 Volt-only, Boot Sector Flash Memory]
分类和应用: 闪存
文件页数/大小: 58 页 / 746 K
品牌: EXCELSEMI [ EXCEL SEMICONDUCTOR INC. ]
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E S I  
E S I  
Excel Semiconductor inc.  
- A random, secure ESN (16 bytes ) only  
- Customer code through the ESI’s Special-Code  
service  
SECURITY SECTOR  
The security sector of the ES29LV320 device pro-  
vides an extra flash memory space that enables  
permanent part identification through an Electronic  
Serial Number (ESN). The security sector uses a  
security lock-Indicator Bit (DQ7) to indicate  
whether or not the security sector is locked when  
shipped from the factory. This bit is permanently set  
at the factory and cannot be changed, which pre-  
vents cloning of a factory locked part. This ensures  
the security of the ESN once the product is shipped  
to the field. Note that the ES29LV320 has a security  
sector size of 256 bytes.  
- Both a random, secure ESN and customer  
code through the ESI’s Special-Code service.  
ESN ( Electronic Serial Number )  
In devices that have an ESN, a Bottom Boot device  
will have the 16-byte (8-word) ESN in sector 0 at  
addresses 000000h-00000Fh in byte mode (or  
000000h-000007h in word mode). In the Top Boot  
device the ESN will be in sector 70 at addresses  
3FFF00h-3FFF0Fh in byte mode (or 1FFF80h-  
1FFF87h in word mode). Note that in upcoming top  
boot versions of this device, the ESN will be located  
in sector 70 at addresses 3FFF00h-3FFF0Fh in byte  
mode (or 1FFF80h-1FFF87h in word mode).  
Security Lock-Indicator Bit (DQ7)  
In the device, the security sector can be provided in  
either factory locked version or customer lockable  
version. The factory-locked version is always pro-  
tected when shipped from the factory, and has the  
security lock-Indicator Bit permanently set to a “1”.  
The customer-lockable version is shipped with  
the security sector unprotected, allowing customers  
to utilize the sector in any manner they choose. The  
customer-lockable version has the security lock-  
Indicator Bit permanently set to a “0”. Thus, the  
security lock-Indicator Bit prevents customer-lock-  
able devices from being used to replace devices  
that are factory locked.  
ESI’s Special-Code Service  
Customers may opt to have their code programmed  
by ESI through the ESI’s Special-Code service. ESI  
programs the customer’s code, with or without the  
random ESN. The devices are then shipped from  
ESI’s factory with the Security Sector permanently  
locked. Contact an ESI representative for details on  
using ESI’s Special-Code service.  
Customer-Lockable Device  
The customer lockable version allows the security  
sector to be freely programmed or erased and then  
permanently locked. Note that the ES29LV320 has  
a security sector size of 256 bytes (128 words). Note  
that the accelerated programming (ACC) and unlock  
bypass functions are not available when program-  
ming the security sector.  
Access to the Security Sector  
The security sector can be accessed through a  
command sequence: Enter security and Exit  
security sector commands. After the system has  
written the Enter security sector command  
sequence, it may read the security sector by using  
the addresses normally occupied by the boot sec-  
tors. This mode of operation continues until the sys-  
tem issues the Exit security sector command  
sequence, or until power is removed from the  
device. On power-up, or following a hardware reset,  
the device returns to read mode in which the nor-  
mal boot sectors can be accessed, instead of the  
security sector.  
Protection of the Security Sector  
The security sector area can be protected using the  
following procedures: Write the three-cycle “Enter  
security sector command” sequence, and then fol-  
lowing the in-system sector protect algorithm as  
shown in Fig. 2, except that RESET# may be at  
either V or V . This allows In-system protection  
IH  
ID  
of the security sector without raising any device pin  
to a high voltage. Note that this method is only appli-  
cable to the security sector. To verify the protect/  
unprotect status of the security sector. follow the  
algorithm shown in Fig. 2.  
Factory-Locked Device  
In a factory-locked device, the security sector is  
protected when the device is shipped from the fac-  
tory. The security sector cannot be modified in any  
way. The device is available preprogrammed with  
one of the following:  
10  
Rev. 0A May 25, 2006  
ES29LV320E