S71PL129JB0BFW9Z0 Spansion Inc., S71PL129JB0BFW9Z0 Datasheet - Page 41
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S71PL129JB0BFW9Z0
Manufacturer Part Number
S71PL129JB0BFW9Z0
Description
Manufacturer
Spansion Inc.
Datasheet
1.S71PL129JB0BFW9Z0.pdf
(153 pages)
Specifications of S71PL129JB0BFW9Z0
Operating Supply Voltage (max)
3.1V
Operating Temperature (max)
85C
Mounting
Surface Mount
Lead Free Status / RoHS Status
Compliant
- Current page: 41 of 153
- Download datasheet (4Mb)
October 28, 2005 S71PL129Jxx_00_A8
Temporary Sector Unprotect
Secured Silicon Sector Flash Memory Region
This feature allows temporary unprotection of previously protected sectors to
change data in-system. The Sector Unprotect mode is activated by setting the
RESET# pin to
grammed or erased by selecting the sector addresses. Once V
the RESET# pin, all the previously protected sectors are protected again.
Figure 2
feature. While PPB lock is set, the device cannot enter the Temporary Sector Un-
protection Mode.
Notes:
1. All protected sectors are unprotected (If WP#/ACC = V
2. All previously protected sectors are protected once again
The Secured Silicon Sector feature provides a Flash memory region that enables
permanent part identification through an Electronic Serial Number (ESN) The
128-word Secured Silicon sector is divided into 64 factory-lockable words that
can be programmed and locked by the customer. The Secured Silicon sector is
located at addresses 000000h-00007Fh in both Persistent Protection mode and
Password Protection mode. Indicator bits DQ6 and DQ7 are used to indicate the
factory-locked and customer locked status of the part.
The system accesses the Secured Silicon Sector through a command sequence
(see
quence”
Sector command sequence, it may read the Secured Silicon Sector by using the
addresses normally occupied by the boot sectors. This mode of operation contin-
ues until the system issues the Exit Secured Silicon Sector 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 normal address space. Note
that the ACC function and unlock bypass modes are not available when the Se-
cured Silicon Sector is enabled.
two sectors remain protected).
“Enter Secured Silicon Sector/Exit Secured Silicon Sector Command Se-
shows the algorithm, and
on page 46). After the system has written the Enter Secured Silicon
A d v a n c e
Figure 2. Temporary Sector Unprotect Operation
V
ID
. During this mode, formerly protected sectors can be pro-
S71PL129JC0/S71PL129JB0/S71PL129JA0
I n f o r m a t i o n
Unprotect Completed
Program Operations
Temporary Sector
Perform Erase or
RESET# = V
RESET# = V
Figure 21
(Note 1)
(Note 2)
START
shows the timing diagrams, for this
ID
IH
IL
, upper two and lower
ID
is removed from
39
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