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S29AL016J70TFI020 Datasheet(PDF) 23 Page - SPANSION

Part # S29AL016J70TFI020
Description  CMOS 3.0 Volt-only Boot Sector Flash Memory
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Manufacturer  SPANSION [SPANSION]
Direct Link  http://www.spansion.com
Logo SPANSION - SPANSION

S29AL016J70TFI020 Datasheet(HTML) 23 Page - SPANSION

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April 12, 2012 S29AL016J_00_12
S29AL016J
23
Data
She e t
Figure 7.2 In-System Sector Group Protect/Unprotect Algorithms
Sector Group Protect:
Write 60h to sector group
address with
A6 = 0,
A3 = A2 = 0,
A1 = 1, A0 = 0
Set up sector
group address
Wait 150 µs
Verify Sector Group
Protect: Write 40h
to sector group address
with A6 = 0,
A3 = A2 = 0,
A1 = 1, A0 = 0
Read from
sector group address
with A6 = 0,
A3 = A2 = 0,
A1 = 1, A0 = 0
START
PLSCNT = 1
RESET# = VID
Wait 1
µs
First Write
Cycle = 60h?
Data = 01h?
Remove VID
from RESET#
Write reset
command
Sector Group
Protect complete
Yes
Yes
No
PLSCNT
= 25?
Yes
Device failed
Increment
PLSCNT
Temporary Sector
Group Unprotect Mode
No
Sector Group Unprotect:
Write 60h to sector
address with
A6 = 1,
A3 = A2 = 0,
A1 = 1, A0 = 0
Set up first sector
group address
Wait 1.5 ms
Verify Sector Group
Unprotect: Write
40h to sector group
address with
A6 = 1,
A3 = A2 = 0,
A1 = 1, A0 = 0
Read from
sector group address
with A6 = 1,
A3 = A2 = 0,
A1 = 1, A0 = 0
START
PLSCNT = 1
RESET# = VID
Wait 1
µs
Data = 00h?
Last sector
group verified?
Remove VID
from RESET#
Write reset
command
Sector Group
Unprotect complete
Yes
No
PLSCNT
= 1000?
Yes
Device failed
Increment
PLSCNT
Temporary Sector
Group Unprotect Mode
No
All sectors
protected?
Yes
Protect all sectors:
The indicated portion
of the sector group protect
algorithm must be
performed for all
unprotected sector groups
prior to issuing the
first sector group
unprotect address
Set up
next sector group
address
No
Yes
No
Yes
No
No
Yes
No
Sector Group
Protect Algorithm
Sector Group
Unprotect Algorithm
First Write
Cycle = 60h?
Protect another
sector group?
Reset
PLSCNT = 1


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