s71ws-j Meet Spansion Inc., s71ws-j Datasheet - Page 43

• Manufacturer Part Number: s71ws-j
• Description: Stacked Multi-chip Product Mcp
• Manufacturer: Meet Spansion Inc.

August 19, 2005 S71WS-J_04_A2
Sector Protect
Temporary Sector
Unprotect Mode
Algorithm
Device failed
Increment
PLSCNT
PLSCNT
= 25?
No
Yes
Figure 2. In-System Sector Protection/Sector Unprotection Algorithms
No
No
Write 60h to sector
Protect: Write 40h
to sector address
A6 = 0, A1 = 1,
Sector Protect:
Protect another
RESET# = V
sector address
A1 = 1, A0 = 0
Sector Protect
from RESET#
Verify Sector
Set up sector
PLSCNT = 1
Cycle = 60h?
address with
with A7:A0 =
Remove V
with A6 = 0,
Wait 150 µs
Data = 01h?
Read from
Write reset
First Write
00000010
command
Wait 1 µs
complete
address
START
sector?
A0 = 0
Yes
Yes
No
ID
ID
Yes
PLSCNT = 1
Reset
P r e l i m i n a r y
S71WS-J Based MCPs
The indicated portion
Protect all sectors:
unprotected sectors
of the sector protect
prior to issuing the
unprotect address
algorithm must be
performed for all
Sector Unprotect
first sector
Algorithm
Device failed
Increment
PLSCNT
PLSCNT
= 1000?
Yes
No
No
No
Write 60h to sector
Set up first sector
Sector Unprotect:
Unprotect: Write
Sector Unprotect
A6 = 1, A1 = 1,
RESET# = V
sector address
A1 = 1, A0 = 0
from RESET#
Verify Sector
40h to sector
address with
PLSCNT = 1
Cycle = 60h?
address with
Remove V
with A6 = 1,
Wait 1.5 ms
Data = 00h?
Write reset
Read from
First Write
Last sector
protected?
01000010
command
Wait 1 µs
All sectors
complete
address
A7:A0 =
verified?
START
A0 = 0
Yes
Yes
Yes
Yes
ID
ID
No
No
Temporary Sector
Unprotect Mode
next sector
address
Set up
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