S29GL128N11FAI020 Spansion Inc., S29GL128N11FAI020 Datasheet - Page 44

• Manufacturer Part Number: S29GL128N11FAI020
• Manufacturer: Spansion Inc.

Specifications of S29GL128N11FAI020

• Cell Type: NOR
• Density: 128Mb
• Access Time (max): 110ns
• Interface Type: Parallel
• Boot Type: Not Required
• Address Bus: 24/23Bit
• Operating Supply Voltage (typ): 3/3.3V
• Operating Temp Range: -40C to 85C
• Package Type: Fortified BGA
• Program/erase Volt (typ): 3/11.5 to 12.5V
• 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: 16M/8M
• Supply Current: 90mA
• Mounting: Surface Mount
• Pin Count: 64
• Lead Free Status / Rohs Status: Not Compliant

7.20
7.21
44
7.19.1
7.19.2
Write Protect (WP#)
Hardware Data Protection
Customer Lockable: Secured Silicon Sector NOT Programmed or Protected
At the Factory
Factory Locked: Secured Silicon Sector Programmed and Protected At the
Factory
Unless otherwise specified, the device is shipped such that the customer may program and protect the 256-
byte Secured Silicon sector.
The system may program the Secured Silicon Sector using the write-buffer, accelerated and/or unlock
bypass methods, in addition to the standard programming command sequence. See
on page
Programming and protecting the Secured Silicon Sector must be used with caution since, once protected,
there is no procedure available for unprotecting the Secured Silicon Sector area and none of the bits in the
Secured Silicon Sector memory space can be modified in any way.
The Secured Silicon Sector area can be protected using one of the following procedures:
Once the Secured Silicon Sector is programmed, locked and verified, the system must write the Exit Secured
Silicon Sector Region command sequence to return to reading and writing within the remainder of the array.
In devices with an ESN, the Secured Silicon Sector is protected when the device is shipped from the factory.
The Secured Silicon Sector cannot be modified in any way. An ESN Factory Locked device has an 16-byte
random ESN at addresses 000000h–000007h. Please contact your sales representative for details on
ordering ESN Factory Locked devices.
Customers may opt to have their code programmed by the factory through the ExpressFlash service (Express
Flash Factory Locked). The devices are then shipped from the factory with the Secured Silicon Sector
permanently locked. Contact your sales representative for details on using the ExpressFlash service.
The Write Protect function provides a hardware method of protecting the first or last sector group without
using V
If the system asserts V
last sector group independently of whether those sector groups were protected or unprotected using the
method described
is in the standby mode, the maximum input load current is increased. See the table in
on page
If the system asserts V
was previously set to be protected or unprotected. Note that WP# has an internal pull-up; when
unconnected, WP# is at V
The command sequence requirement of unlock cycles for programming or erasing provides data protection
against inadvertent writes (refer to
In addition, the following hardware data protection measures prevent accidental erasure or programming,
which might otherwise be caused by spurious system level signals during V
transitions, or from system noise.
Write the three-cycle Enter Secured Silicon Sector Region command.
To verify the protect/unprotect status of the Secured Silicon Sector, follow the algorithm.
ID
48.
70.
. Write Protect is one of two functions provided by the WP#/ACC input.
inAdvanced Sector Protection on page
IL
IH
on the WP#/ACC pin, the device disables program and erase functions in the first or
on the WP#/ACC pin, the device reverts to whether the first or last sector
IH
.
Table 9.1 on page 60
S29GL-N
D a t a
S h e e t
and
39. Note that if WP#/ACC is at V
Table 9.3 on page 62
CC
power-up and power-down
S29GL-N_00_B8 May 30, 2008
for command definitions).
Command Definitions
DC Characteristics
IL
when the device