S29GL032N90TFI040 Spansion Inc., S29GL032N90TFI040 Datasheet - Page 30

• Manufacturer Part Number: S29GL032N90TFI040
• Description: IC, FLASH, 32MBIT, 90NS, TSOP-48
• Manufacturer: Spansion Inc.

Specifications of S29GL032N90TFI040

• Memory Type: Flash
• Memory Size: 32Mbit
• Ic Interface Type: CFI, Parallel
• Access Time: 90ns
• Supply Voltage Range: 2.7V To 3.6V
• Memory Case Style: TSOP
• No. Of Pins: 48
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8.9
30
8.9.1
8.9.2
8.9.3
8.9.4
Advanced Sector Protection
Persistent Sector Protection
Password Sector Protection
WP# Hardware Protection
Selecting a Sector Protection Mode
The device features several levels of sector protection, which can disable both the program and erase
operations in certain sectors:
A command sector protection method that replaces the old 12 V controlled protection method.
A highly sophisticated protection method that requires a password before changes to certain sectors are
permitted
A write protect pin that can prevent program or erase operations in the outermost sectors.
The WP# Hardware Protection feature is always available, independent of the software managed protection
method chosen.
All parts default to operate in the Persistent Sector Protection mode. The user must then choose if the
Persistent or Password Protection method is most desirable. There are two one-time programmable non-
volatile bits that define which sector protection method is used. If the user decides to continue using the
Persistent Sector Protection method, they must set the Persistent Sector Protection Mode Locking Bit.
This permanently sets the part to operate only using Persistent Sector Protection. If the user decides to use
the password method, they must set the Password Mode Locking Bit. This permanently sets the part to
operate only using password sector protection.
It is important to remember that setting either the Persistent Sector Protection Mode Locking Bit or the
Password Mode Locking Bit permanently selects the protection mode. It is not possible to switch between
the two methods once a locking bit is set. It is important that one mode is explicitly selected when the
device is first programmed, rather than relying on the default mode alone. This is so that it is not
possible for a system program or virus to later set the Password Mode Locking Bit, which would cause an
unexpected shift from the default Persistent Sector Protection Mode into the Password Protection Mode.
The device is shipped with all sectors unprotected. Spansion offers the option of programming and protecting
sectors at the factory prior to shipping the device through the ExpressFlash™ Service. Contact your sales
representative for details.
It is possible to determine whether a sector is protected or unprotected. See
on page 42
for details.
S29GL-N MirrorBit
D a t a
®
Flash Family
S h e e t
Autoselect Command Sequence
S29GL-N_01_12 October 29, 2008