AM50DL128BG70I Spansion Inc., AM50DL128BG70I Datasheet - Page 22
AM50DL128BG70I
Manufacturer Part Number
AM50DL128BG70I
Description
Manufacturer
Spansion Inc.
Datasheet
1.AM50DL128BG70I.pdf
(64 pages)
Specifications of AM50DL128BG70I
Operating Supply Voltage (max)
3.3V
Operating Temperature (max)
85C
Mounting
Surface Mount
Lead Free Status / RoHS Status
Not Compliant
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January 8, 2003
Sector Protect
Temporary Sector
Unprotect Mode
Algorithm
Device failed
Increment
PLSCNT
PLSCNT
= 25?
No
Yes
No
No
Write 60h to sector
Protect: Write 40h
to sector address
A6 = 0, A1 = 1,
Protect another
Sector Protect:
sector address
RESET# = V
A1 = 1, A0 = 0
A1 = 1, A0 = 0
Sector Protect
from RESET#
Verify Sector
Set up sector
Cycle = 60h?
Remove V
PLSCNT = 1
address with
with A6 = 0,
with A6 = 0,
Data = 01h?
Wait 150 µs
Write reset
Read from
First Write
command
Wait 1 s
complete
address
START
Figure 2. In-System Sector Protect/Unprotect Algorithms
sector?
A0 = 0
Yes
Yes
No
ID
ID
Yes
PLSCNT = 1
P R E L I M I N A R Y
Reset
Am50DL128BG
The indicated portion
unprotected sectors
Protect all 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,
A6 = 1, A1 = 1,
sector address
RESET# = V
A1 = 1, A0 = 0
from RESET#
Verify Sector
40h to sector
address with
Cycle = 60h?
Remove V
PLSCNT = 1
address with
with A6 = 1,
Data = 00h?
Wait 15 ms
Write reset
Read from
First Write
Last sector
protected?
command
Wait 1 s
All sectors
complete
address
verified?
START
A0 = 0
A0 = 0
Yes
Yes
Yes
Yes
ID
ID
No
No
Temporary Sector
Unprotect Mode
next sector
address
Set up
21
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