參數(shù)資料
型號： 29PL256N
廠商： Spansion Inc.
英文描述： 256/128/128 Mb (16/8/8 M x 16-Bit) CMOS, 3.0 Volt-only Simultaneous Read/Write, Page-Mode Flash Memory
中文描述： 256/128/128字節(jié)（16/8/8 M中的x 16位），3.0伏的CMOS只同步讀/寫，頁模式閃存
文件頁數(shù)： 51/74頁
文件大?。?/td> 1968K
代理商： 29PL256N
June 6, 2007 S29PL-N_00_A5
S29PL-N MirrorBit
Flash Family
51
D a t a
S h e e t
( P r e l i m i n a r y )
10. Secured Silicon Sector Flash Memory Region
The Secured Silicon Sector provides an extra Flash memory region that enables permanent part identification
through an Electronic Serial Number (ESN). The Secured Silicon Sector is 256 words in length that consists
of 128 words for factory data and 128 words for customer-secured areas. All Secured Silicon reads outside of
the 256-word address range returns invalid data. The Factory Indicator Bit, DQ7, (at Autoselect address 03h)
is used to indicate whether or not the Factory Secured Silicon Sector is locked when shipped from the factory.
The Customer Indicator Bit (DQ6) is used to indicate whether or not the Customer Secured Silicon Sector is
locked when shipped from the factory.
Note the following general conditions:
While the Secured Silicon Sector access is enabled, simultaneous operations are allowed except for Bank
A.
On power up, or following a hardware reset, the device reverts to sending commands to the normal
address space.
Reads outside of sector 0 return memory array data.
Sector 0 is remapped from the memory array to the Secured Silicon Sector array.
Once the Secured Silicon Sector Entry Command is issued, the Secured Silicon Sector Exit command
must be issued to exit Secured Silicon Sector Mode.
The Secured Silicon Sector is not accessible when the device is executing an Embedded Program or
Embedded Erase algorithm.
10.1
Factory Secured Silicon Sector
The Factory Secured Silicon Sector is always protected when shipped from the factory and has the Factory
Indicator Bit (DQ7) permanently set to a
1
. This prevents cloning of a factory locked part and ensures the
security of the ESN and customer code once the product is shipped to the field.
These devices are available pre programmed with one of the following:
A random, 8-word secure ESN only within the Factory Secured Silicon Sector
Customer code within the Customer Secured Silicon Sector through the Spansion
TM
programming service.
Both a random, secure ESN and customer code through the Spansion programming service.
Customers may opt to have their code programmed through the Spansion programming services. Spansion
programs the customer's code, with or without the random ESN. The devices are then shipped from the
Spansion factory with the Factory Secured Silicon Sector and Customer Secured Silicon Sector permanently
locked. Contact your local representative for details on using Spansion programming services.
Table 10.1
Secured Silicon Sector Addresses
Sector
Sector Size
Address Range
Customer
128 words
000080h-0000FFh
Factory
128 words
000000h-00007Fh
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