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S29AL016 View Datasheet(PDF) - Spansion Inc.

Part NameDescriptionManufacturer
S29AL016 16 Megabit (2 M x 8-Bit/1 M x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory Spansion
Spansion Inc. Spansion
S29AL016 Datasheet PDF : 55 Pages
First Prev 21 22 23 24 25 26 27 28 29 30 Next Last
Data Sheet
Temporary Sector
Unprotect Mode
Figure 7.2 In-System Sector Protect/Unprotect Algorithms
START
PLSCNT = 1
RESET# = VID
Wait 1 μs
No First Write
Cycle = 60h?
Protect all sectors:
The indicated portion
of the sector protect
algorithm must be
performed for all
unprotected sectors
prior to issuing the
first sector
unprotect address
START
PLSCNT = 1
RESET# = VID
Wait 1 μs
First Write No Temporary Sector
Cycle = 60h?
Unprotect Mode
Increment
PLSCNT
No
PLSCNT
= 25?
Yes
Device failed
Yes
Set up sector
address
Sector Protect:
Write 60h to sector
address with
A6 = 0, A1 = 1,
A0 = 0
Wait 150 µs
Verify Sector
Protect: Write 40h
to sector address
with A6 = 0,
A1 = 1, A0 = 0
Read from
sector address
with A6 = 0,
A1 = 1, A0 = 0
Reset
PLSCNT = 1
No
Data = 01h?
Yes
Yes
Protect another
sector?
No
Remove VID
from RESET#
Sector Protect
Algorithm
Write reset
command
Sector Protect
complete
Increment
PLSCNT
Yes
No All sectors
protected?
Yes
Set up first sector
address
Sector Unprotect:
Write 60h to sector
address with
A6 = 1, A1 = 1,
A0 = 0
Wait 15 ms
Verify Sector
Unprotect: Write
40h to sector
address with
A6 = 1, A1 = 1,
A0 = 0
No
PLSCNT
= 1000?
Yes
Read from
sector address
with A6 = 1,
A1 = 1, A0 = 0
No
Data = 00h?
Yes
Set up
next sector
address
Device failed
Sector Unprotect
Algorithm
Last sector No
verified?
Yes
Remove VID
from RESET#
Write reset
command
Sector Unprotect
complete
February 27, 2009 S29AL016D_00_A8
S29AL016D
21
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