s29jl064j Meet Spansion Inc., s29jl064j Datasheet - Page 23

• Manufacturer Part Number: s29jl064j
• Description: 64 Megabit 8m X 8-bit/4m X 16-bit Cmos 3.0 Volt-only, Simultaneous Read/write Flash Memory
• Manufacturer: Meet Spansion Inc.

8.11
April 7, 2011 S29JL064J_00_03
Write Protect (WP#)
Sector Protect/Sector Unprotect requires V
system or via programming equipment.
on page 54
prior to the first sector unprotect write cycle. Note that the sector unprotect algorithm unprotects all sectors in
parallel. All previously protected sectors must be individually re-protected. To change data in protected
sectors efficiently, the temporary sector unprotect function is available. See
on page
The device is shipped with all sectors unprotected. Optional Spansion programming service 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
details.
The Write Protect function provides a hardware method of protecting without using V
two provided by the WP#/ACC pin.
If the system asserts V
1, 140, and 141, independently of whether those sectors were protected or unprotected using the method
described in
If the system asserts V
last set to be protected or unprotected. That is, sector protection or unprotection for these sectors depends on
whether they were last protected or unprotected using the method described in
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.
WP# Input Voltage
Table 8.6 S29JL064J Boot Sector/Sector Block Addresses for Protection/Unprotection (Sheet 2 of 2)
V
V
V
SA131–SA133
24.
HH
IH
IL
Sector
SA134
SA135
SA136
SA137
SA138
SA139
SA140
SA141
shows the timing diagram. For sector unprotect, all unprotected sectors must first be protected
Boot Sector/Sector Block Protection and Unprotection on page
Disables programming and erasing in SA0, SA1, SA140, and SA141
Enables programming and erasing in SA0, SA1, SA140, and SA141, dependent on whether they were last
protected or unprotected.
Enables accelerated programming (ACC).
IL
IH
on the WP#/ACC pin, the device disables program and erase functions in sectors 0,
on the WP#/ACC pin, the device reverts to whether sectors 0, 1, 140, and 141 were
D a t a
S h e e t
1111100XXX,
1111101XXX,
22.
1111110XXX
1111111000
1111111001
1111111010
1111111011
1111111100
1111111101
1111111110
1111111111
A21–A12
Figure 8.2 on page 25
S29JL064J
Table 8.7 WP#/ACC Modes
ID
on the RESET# pin only, and can be implemented either in-
See Accelerated Program Operation on page 15.
Device Mode
shows the algorithms and
Sector/Sector Block Size
Temporary Sector Unprotect
192 (3x64) kbytes
Autoselect Mode on page 21
22.
Boot Sector/Sector Block
8 kbytes
8 kbytes
8 kbytes
8 kbytes
8 kbytes
8 kbytes
8 kbytes
8 kbytes
ID
. This function is one of
Figure 17.13
for
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