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S29GL128N11TAIV10 参数 Datasheet PDF下载

S29GL128N11TAIV10图片预览
型号: S29GL128N11TAIV10
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110纳米MirrorBit⑩工艺技术 [3.0 Volt-only Page Mode Flash Memory featuring 110 nm MirrorBit⑩ Process Technology]
分类和应用: 闪存
文件页数/大小: 100 页 / 2678 K
品牌: SPANSION [ SPANSION ]
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D a t a S h e e t  
64-bit Password  
The 64-bit Password is located in its own memory space and is accessible through the use of  
the Password Program and Password Read commands. The password function works in con-  
junction with the Password Protection Mode Lock Bit, which when programmed, prevents the  
Password Read command from reading the contents of the password on the pins of the  
device.  
Persistent Protection Bit Lock (PPB Lock Bit)  
A global volatile bit. The PPB Lock Bit is a volatile bit that reflects the state of the Password  
Protection Mode Lock Bit after power-up reset. If the Password Protection Mode Lock Bit is  
also programmed after programming the Password, the Password Unlock command must be  
issued to clear and unfreeze the PPB Lock Bit after a hardware reset (RESET# asserted) or a  
power-up reset. Successful execution of the Password Unlock command clears and unfreezes  
the PPB Lock Bit, allowing for sector PPB bits to be modified. Without issuing the Password  
Unlock command, while asserting RESET#, taking the device through a power-on reset, or  
issuing the PPB Lock Bit Set command sets the PPB Lock Bit to a the “freeze state.  
If the Password Protection Mode Lock Bit is not programmed, the device defaults to Persistent  
Protection Mode. In the Persistent Protection Mode, the PPB Lock Bit is cleared to the unfreeze  
state after power-up or hardware reset. The PPB Lock Bit is set to the freeze state by issuing  
the PPB Lock Bit Set command. Once set to the freeze state the only means for clearing the  
PPB Lock Bit to the “unfreeze state” is by issuing a hardware or power-up reset. The Password  
Unlock command is ignored in Persistent Protection Mode.  
Reading the PPB Lock Bit requires a 200ns access time.  
Secured Silicon Sector Flash Memory Region  
The Secured Silicon Sector feature provides a Flash memory region that enables permanent  
part identification through an Electronic Serial Number (ESN). The Secured Silicon Sector is  
256 bytes in length, and uses a Secured Silicon Sector Indicator Bit (DQ7) to indicate whether  
or not the Secured Silicon Sector is locked when shipped from the factory. This bit is perma-  
nently 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 Secured Silicon Sector either customer lockable (stan-  
dard shipping option) or factory locked (contact an AMD sales representative for ordering  
information). The customer-lockable version is shipped with the Secured Silicon Sector un-  
protected, allowing customers to program the sector after receiving the device. The  
customer-lockable version also has the Secured Silicon Sector Indicator Bit permanently set  
to a 0. The factory-locked version is always protected when shipped from the factory, and has  
the Secured Silicon Sector Indicator Bit permanently set to a 1. Thus, the Secured Silicon Sec-  
tor Indicator Bit prevents customer-lockable devices from being used to replace devices that  
are factory locked.  
The Secured Silicon sector address space in this device is allocated as follows:  
Secured Silicon 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 Secured Silicon Sector through a command sequence (see “Write  
Protect (WP#)”). After the system has written the Enter Secured Silicon Sector command se-  
quence, it may read the Secured Silicon Sector by using the addresses normally occupied by  
S29GL-N_00_B3 October 13, 2006  
S29GL-N MirrorBit™ Flash Family  
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