S29JL032J70TFI420 Spansion Inc., S29JL032J70TFI420 Datasheet - Page 26

• 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

8.11
8.12
26
Write Protect (WP#)
Temporary Sector Unprotect
The Write Protect function provides a hardware method of protecting certain boot sectors without using V
This function is one of two provided by the WP#/ACC pin.
If the system asserts V
outermost 8 Kbyte boot sectors independently of whether those sectors were protected or unprotected using
the method described in
outermost 8 Kbyte boot sectors are the two sectors containing the lowest addresses in a bottom-boot-
configured device, or the two sectors containing the highest addresses in a top-boot-configured device.
If the system asserts V
sectors were last set to be protected or unprotected. That is, sector protection or unprotection for these two
sectors depends on whether they were last protected or unprotected using the method described in
Sector/Sector Block Protection and Unprotection on page
Note that the WP#/ACC pin must not be left floating or unconnected; inconsistent behavior of the device may
result.
Note: For the following discussion, the term “sector” applies to both sectors and sector blocks. A sector block
consists of two or more adjacent sectors that are protected or unprotected at the same time (see
on page 24
This feature allows temporary unprotection of previously protected sectors to change data in-system. The
Temporary Sector Unprotect mode is activated by setting the RESET# pin to V
protected sectors can be programmed or erased by selecting the sector addresses. Once V
from the RESET# pin, all the previously protected sectors are protected again.
algorithm, and
V
Notes:
1. All protected sectors unprotected (If WP#/ACC = V
2. All previously protected sectors are protected once again.
IL
WP# Input Voltage
, the two outermost boot sectors will remain protected during the Temporary sector Unprotect mode.
V
V
V
HH
IH
IL
and
Figure 17.12 on page 56
Table 8.7 on page
Disables programming and erasing in the two outermost boot sectors
Enables programming and erasing in the two outermost boot sectors, dependent on whether they were last
protected or unprotected
Enables accelerated programming (ACC).
IH
IL
Boot Sector/Sector Block Protection and Unprotection on page
on the WP#/ACC pin, the device disables program and erase functions in the two
on the WP#/ACC pin, the device reverts to whether the two outermost 8K Byte boot
Figure 8.1 Temporary Sector Unprotect Operation
D a t a
25).
S29JL032J
Table 8.8 WP#/ACC Modes
shows the timing diagrams, for this feature. If the WP#/ACC pin is at
S h e e t
IL
, the outermost two boot sectors will remain protected).
Unprotect Completed
Program Operations
Temporary Sector
Perform Erase or
RESET# = V
RESET# = V
(Note 1)
(Note 2)
START
See Accelerated Program Operation on page 16.
( P r e l i m i n a r y )
24.
Device Mode
ID
IH
S29JL032J_00_03 August 25, 2010
ID
Figure 8.1
. During this mode, formerly
24. The two
shows the
ID
is removed
Table 8.6
Boot
ID
.