S29JL032H70TFI420 Spansion Inc., S29JL032H70TFI420 Datasheet - Page 22

• Manufacturer Part Number: S29JL032H70TFI420
• Description: IC,EEPROM,NOR FLASH,2MX16/4MX8,CMOS,TSSOP,48PIN,PLASTIC
• Manufacturer: Spansion Inc.

Specifications of S29JL032H70TFI420

• Data Bus Width: 8 bit, 16 bit
• Architecture: Boot Sector
• Interface Type: Conventional
• Access Time: 70 ns
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 2.7 V
• Maximum Operating Current: 2 mA
• Mounting Style: SMD/SMT
• Memory Type: Flash
• Memory Size: 32 Mbit
• Operating Temperature: + 85 C
• Package / Case: TSOP-48
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

22
WP# Input Voltage
Write Protect (WP#)
Temporary Sector Unprotect
V
V
V
The Write Protect function provides a hardware method of protecting certain boot
sectors without using V
pin.
If the system asserts V
erase functions in the two outermost 8 Kbyte boot sectors independently of
whether those sectors were protected or unprotected using the method described
in “Sector/Sector Block Protection and Unprotection”. The two 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
two outermost 8K Byte boot 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”.
Note that the WP#/ACC pin must not be left floating or unconnected; inconsistent
behavior of the device may result.
HH
(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 Table
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
be programmed or erased by selecting the sector addresses. Once V
from the RESET# pin, all the previously protected sectors are protected again.
shows the algorithm, and 25 shows the timing diagrams, for this feature. If the
WP#/ACC pin is at V
the Temporary sector Unprotect mode.
IH
IL
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). See “Accelerated Program Operation” on
page 12..
IL
, the two outermost boot sectors will remain protected during
IH
IL
ID
. This function is one of two provided by the WP#/ACC
on the WP#/ACC pin, the device reverts to whether the
on the WP#/ACC pin, the device disables program and
Table 8. WP#/ACC Modes
V
A D V A N C E
ID
. During this mode, formerly protected sectors can
S29JL032H
I N F O R M A T I O N
Device
Mode
6
and Table 7).
ID
is removed
S29JL032HA0 May 21, 2004