S29JL032J70TFI420 Spansion Inc., S29JL032J70TFI420 Datasheet - Page 28

• Manufacturer Part Number: S29JL032J70TFI420
• Description: IC 3V 32M SIMULTANEOUS READ/WRITE FLASH
• Manufacturer: Spansion Inc.

Specifications of S29JL032J70TFI420

• Cell Type: NOR
• Density: 32Mb
• Access Time (max): 70ns
• Interface Type: Serial
• Boot Type: Bottom
• Address Bus: 22/21Bit
• Operating Supply Voltage (typ): 3/3.3V
• Operating Temp Range: -40C to 85C
• Package Type: TSOP
• Program/erase Volt (typ): 2.7 to 3.6V
• Sync/async: Asynchronous
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 3.6V
• Word Size: 8/16Bit
• Number Of Words: 4M/2M
• Supply Current: 16mA
• Mounting: Surface Mount
• Pin Count: 48
• Lead Free Status / Rohs Status: Supplier Unconfirmed

8.13
28
8.13.1
8.13.2
Secured Silicon Region
Factory Locked: Secured Silicon Region Programmed and Protected At the
Factory
Customer Lockable: Secured Silicon Region NOT Programmed or Protected
At the Factory
The Secured Silicon Region feature provides a Flash memory region that enables permanent part
identification through an Electronic Serial Number (ESN). The Secured Silicon Region is 256 bytes in length,
and may shipped unprotected, allowing customers to utilize that sector in any manner they choose, or may
shipped locked at the factory (upon customer request). The Secured Silicon Indicator Bit data will be 82h if
factory locked, 42h if customer locked, or 02h if neither. Refer to
The system accesses the Secured Silicon through a command sequence (see
Exit Secured Silicon Region Command Sequence on page
Secured Silicon Region command sequence, it may read the Secured Silicon Region by using the addresses
normally occupied by the boot sectors. This mode of operation continues until the system issues the Exit
Secured Silicon Region command sequence, or until power is removed from the device. On power-up, or
following a hardware reset, the device reverts to sending commands to the first 256 bytes of Sector 0. Note
that the ACC function and unlock bypass modes are not available when the Secured Silicon Region is
enabled.
In a factory locked device, the Secured Silicon Region is protected when the device is shipped from the
factory. The Secured Silicon Region cannot be modified in any way. The device is preprogrammed with both
a random number and a secure ESN. The 8-word random number is at addresses 000000h-000007h in word
mode (or 000000h-00000Fh in byte mode). The secure ESN is programmed in the next 8 words at addresses
000008h-00000Fh (or 000010h-00001Fh in byte mode). The device is available preprogrammed with one of
the following:
 A random, secure ESN only
 Customer code through Spansion programming services
 Both a random, secure ESN and customer code through Spansion programming services
Contact an your local sales office for details on using Spansion programming services.
If the security feature is not required, the Secured Silicon Region can be treated as an additional Flash
memory space. The Secured Silicon Region can be read any number of times, but can be programmed and
locked only once. Note that the accelerated programming (ACC) and unlock bypass functions are not
available when programming the Secured Silicon Region.
 Write the three-cycle Enter Secured Silicon Region command sequence, and then follow the insystem
 To verify the protect/unprotect status of the Secured Silicon Region, follow the algorithm shown in
Once the Secured Silicon Region is locked and verified, the system must write the Exit Secured Silicon
Region command sequence to return to reading and writing the remainder of the array. The Secured Silicon
Region lock must be used with caution since, once locked, there is no procedure available for unlocking the
Secured Silicon Region area and none of the bits in the Secured Silicon Region memory space can be
modified in any way.
sector protect algorithm as shown in
V
voltage. Note that this method is only applicable to the Secured Silicon Region.
Figure 8.3 on page
ID
. This allows in-system protection of the Secured Silicon Region without raising any device pin to a high
29.
D a t a
Figure 8.2 on page
S29JL032J
S h e e t
( P r e l i m i n a r y )
34). After the system has written the Enter
27, except that RESET# may be at either V
Table 8.5 on page 23
S29JL032J_00_03 August 25, 2010
Enter Secured Silicon Region/
for more details.
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or