s71pl512nd0 Meet Spansion Inc., s71pl512nd0 Datasheet - Page 54
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s71pl512nd0
Manufacturer Part Number
s71pl512nd0
Description
Two S29pl256n Devices 32 M X 16-bit Cmos 3.0-volt Only Simultaneous Read/write, Page-mode Flash Memory
Manufacturer
Meet Spansion Inc.
Datasheet
1.S71PL512ND0.pdf
(90 pages)
- Current page: 54 of 90
- Download datasheet (2Mb)
12 Secured Silicon Sector Flash Memory Region
12.1
52
Factory Secured Silicon Sector
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 Se-
cured 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:
T While the Secured Silicon Sector access is enabled, simultaneous operations are allowed ex-
T On power up, or following a hardware reset, the device reverts to sending commands to the
T Reads outside of sector 0 return memory array data.
T Sector 0 is remapped from the memory array to the Secured Silicon Sector array.
T Once the Secured Silicon Sector Entry Command is issued, the Secured Silicon Sector Exit
T The Secured Silicon Sector is not accessible when the device is executing an Embedded Pro-
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:
T A random, 8-word secure ESN only within the Factory Secured Silicon Sector
T Customer code within the Customer Secured Silicon Sector through the Spansion
T 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.
cept for Bank A.
normal address space.
command must be issued to exit Secured Silicon Sector Mode.
gram or Embedded Erase algorithm.
ming service.
Customer
Factory
Sector
Table 12.1
S29PL-N MirrorBit™ Flash Family
Sector Size
128 words
128 words
P r e l i m i n a r y
Secured Silicon Sector Addresses
000080h-0000FFh
000000h-00007Fh
Address Range
S29PL-N_M0_A4 November 23, 2005
TM
program-
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