s71pl129ja0 Meet Spansion Inc., s71pl129ja0 Datasheet - Page 32

• Manufacturer Part Number: s71pl129ja0
• Description: Stacked Multi-chip Product Mcp Flash Memory And Psram 128 Megabit 8m X 16-bit Cmos 3.0 Volt-only Simultaneous Operation, Page Mode Flash Memory With 64/32/16 Megabit 4m/2m/1m X 16-bit Pseudo-static Ram
• Manufacturer: Meet Spansion Inc.

Sector Protection
32
DYB
0
0
0
1
1
0
1
1
Selecting a Sector Protection Mode
Persistent Sector Protection
Password Sector Protection
WP# Hardware Protection
Selecting a Sector Protection Mode
The device is shipped with all sectors unprotected. Optional Spansion program-
ming services enable programming and protecting sectors at the factory prior to
shipping the device. Contact your local sales office for details.
It is possible to determine whether a sector is protected or unprotected. See
cured Silicon Sector Addresses”
The PL129J features several levels of sector protection, which can disable both
the program and erase operations in certain sectors or sector groups:
A command sector protection method that replaces the old 12 V controlled pro-
tection method.
A highly sophisticated protection method that requires a password before
changes to certain sectors or sector groups are permitted
A write protect pin that can prevent program or erase operations in sectors SA1-
133, SA1-134, SA2-0 and SA2-1.
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 cus-
tomer must then choose if the Persistent or P assword Protection method is most
desirable. There are two one-time programmable non-volatile bits that define
which sector protection method is used. If the Persistent Sector Protection
method is desired, programming the P ersistent Sector Protection Mode Locking
Bit permanently sets the device to the Persistent Sector Protection mode. If the
P assword Sector Protection method is desired, programming the Password Mode
Locking Bit permanently sets the device to the Password Sector Protection mode.
It is not possible to switch between the two protection modes once a locking bit
has been set. One of the two modes must be selected when the device is first
PPB
0
0
1
0
1
1
0
1
Table 7. Sector Protection Schemes
PPB Lock
0
1
0
0
0
1
1
1
A d v a n c e
S29PL129J for MCP
on page 29 for details.
Unprotected—PPB not changeable, DYB is changeable
Protected—PPB not changeable, DYB is changeable
I n f o r m a t i o n
Unprotected—PPB and DYB are changeable
Protected—PPB and DYB are changeable
Sector State
S29PL129J_MCP_00_A0 June 4, 2004
“Se-