s29al008j Meet Spansion Inc., s29al008j Datasheet - Page 22

• Manufacturer Part Number: s29al008j
• Description: 8 Megabit 1 M X 8-bit/512 K X 16-bit Cmos 3.0 Volt-only Boot Sector Flash Memory
• Manufacturer: Meet Spansion Inc.

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The Secured Silicon Sector protection must be used with caution since, once protected, there is no procedure
available for unprotecting the Secured Silicon Sector area, and none of the bits in the Secured Silicon Sector
memory space can be modified in any way.
D a t a
Figure 8.1 Secured Silicon Sector Protect Verify
S h e e t
Write 40h to SecSi
Read from SecSi
Sector address
Sector address
S29AL008J
A1 = 1, A0 = 0
A1 = 1, A0 = 0
Write 60h to
any address
with A6 = 0,
with A6 = 0,
RESET# =
Wait 1 ms
V
START
IH
or V
( A d v a n c e
ID
Remove V
SecSi Sector is
SecSi Sector is
If data = 00h,
If data = 01h,
from RESET#
SecSi Sector
Protect Verify
unprotected.
Write reset
protected.
command
complete
I n f o r m a t i o n )
IH
or V
ID
S29AL008J_00_04 May 23, 2008