S29GL-A SPANSION [SPANSION], S29GL-A Datasheet - Page 38
S29GL-A
Manufacturer Part Number
S29GL-A
Description
S29GL-A MirrorBit Flash Family
Manufacturer
SPANSION [SPANSION]
Datasheet
1.S29GL-A.pdf
(89 pages)
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36
Sector Group
Temporary Sector
Group Unprotect
Algorithm
Device failed
Protect
Increment
PLSCNT
PLSCNT
Mode
= 25?
No
Yes
No
No
Sector Group Protect:
sector group address
Verify Sector Group
Figure 2. In-System Sector Group Protect/Unprotect Algorithms
Write 60h to sector
group address with
Protect: Write 40h
A6–A0 = 0xx0010
A6–A0 = 0xx0010
Protect complete
to sector group
RESET# = V
group address
from RESET#
Sector Group
sector group?
Set up sector
address with
Remove V
PLSCNT = 1
Cycle = 60h?
Wait 150 µs
with A6–A0
Data = 01h?
Write reset
Read from
First Write
= 0xx0010
command
Wait 1 µs
START
another
Protect
No
Yes
Yes
ID
ID
Yes
S29GL-A MirrorBit™ Flash Family
PLSCNT = 1
A d v a n c e
Reset
must be performed for all
group protect algorithm
groups: The indicated
groups prior to issuing
the first sector group
portion of the sector
unprotected sector
Protect all sector
unprotect address
Sector Group
Unprotect
Algorithm
I n f o r m a t i o n
Device failed
Increment
PLSCNT
PLSCNT
= 1000?
Yes
No
No
No
Verify Sector Group
40h to sector group
Unprotect complete
Write 60h to sector
group address with
Set up first sector
A6–A0 = 1xx0010
A6–A0 = 1xx0010
A6–A0 = 1xx0010
Unprotect: Write
RESET# = V
group address
Sector Group
from RESET#
Sector Group
address with
sector group
address with
Remove V
PLSCNT = 1
Cycle = 60h?
Data = 00h?
Wait 15 ms
Write reset
Read from
First Write
Unprotect:
Last sector
protected?
command
Wait 1 µs
All sector
verified?
START
groups
group
Yes
Yes
Yes
Yes
ID
ID
S29GL-A_00_A3 April 22, 2005
No
No
next sector group
Temporary Sector
Group Unprotect
address
Set up
Mode
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