S71AL016D SPANSION [SPANSION], S71AL016D Datasheet - Page 22
S71AL016D
Manufacturer Part Number
S71AL016D
Description
Stacked Multi-Chip Product (MCP) Flash Memory and RAM
Manufacturer
SPANSION [SPANSION]
Datasheet
1.S71AL016D.pdf
(76 pages)
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22
Temporary Sector
Unprotect Mode
Sector Protect
from RESET#
Remove V
Device failed
Increment
Write reset
PLSCNT
PLSCNT
command
complete
= 25?
No
Yes
Sector Protect
ID
Algorithm
No
No
Write 60h to sector
Protect: Write 40h
to sector address
Protect another
Sector Protect:
sector address
RESET# = V
Sector Protect
Verify Sector
from RESET#
Set up sector
with A7-A0 =
Cycle = 60h?
with A7-A0 =
Remove V
PLSCNT = 1
address with
Data = 01h?
Wait 100 µs
Write reset
Read from
First Write
00000010
00000010
command
Wait 4 µs
00000010
complete
A7-A0 =
Figure 2. In-System Sector Protect/Unprotect Algorithms
address
START
sector?
Yes
Yes
No
ID
ID
Yes
PLSCNT = 1
A d v a n c e
Reset
S29AL016D
The indicated portion
unprotected sectors
Protect all sectors:
of the sector protect
prior to issuing the
unprotect address
algorithm must be
performed for all
first sector
Sector Unprotect
I n f o r m a t i o n
from RESET#
Device failed
Remove V
Write reset
Increment
command
PLSCNT
PLSCNT
complete
= 1000?
Yes
No
Sector Unprotect
ID
Algorithm
No
No
Write 60h to sector
Set up first sector
Sector Unprotect:
Unprotect: Write
Sector Unprotect
sector address
RESET# = V
40h to sector
from RESET#
Verify Sector
address with
with A7-A0 =
Cycle = 60h?
Remove V
PLSCNT = 1
address with
Wait 1.2 ms
Data = 00h?
Write reset
Read from
First Write
Last sector
01000010
00000010
00000010
command
All sectors
protected?
Wait 4 µs
complete
A7-A0 =
A7-A0 =
address
verified?
START
Yes
Yes
Yes
Yes
S29AL016D_00_A1_E August 4, 2004
ID
ID
No
No
Temporary Sector
Unprotect Mode
next sector
address
Set up
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