AM29LV641DH120REI Spansion Inc., AM29LV641DH120REI Datasheet - Page 21

• Manufacturer Part Number: AM29LV641DH120REI
• Description: Flash Memory IC
• Manufacturer: Spansion Inc.

Specifications of AM29LV641DH120REI

• Memory Configuration: 4M X 16
• Ic Interface Type: Parallel
• Access Time: 120ns
• Memory Case Style: TSOP
• No. Of Pins: 48
• Mounting Type: Surface Mount
• Peak Reflow Compatible (260 C): No
• Supply Voltage: 3V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

20
Sector Group
Temporary Sector
Group Unprotect
Algorithm
Device failed
Protect
Increment
PLSCNT
PLSCNT
Mode
= 25?
No
Yes
No
No
Sector Group Protect:
address twith A6 = 0,
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
Protect complete
A6 = 0, A1 = 1,
to sector group
RESET# = V
group address
A1 = 1, A0 = 0
A1 = 1, A0 = 0
from RESET#
Sector Group
Set up sector
sector group?
PLSCNT = 1
Cycle = 60h?
Remove V
with A6 = 0,
Wait 150 µs
Data = 01h?
Write reset
Read from
First Write
command
Wait 1 s
START
another
Protect
A0 = 0
No
Yes
Yes
ID
ID
Yes
PLSCNT = 1
Am29LV640D/Am29LV641D
Reset
must be performed for all
group protect algorithm
groups prior to issuing
groups: The indicated
the first sector group
portion of the sector
unprotected sector
Protect all sector
unprotect address
Sector Group
Unprotect
Algorithm
Device failed
Increment
PLSCNT
PLSCNT
= 1000?
Yes
No
No
No
address with A6 = 1,
Verify Sector Group
40h to sector group
Unprotect complete
Write 60h to sector
group address with
Set up first sector
Unprotect: Write
A6 = 1, A1 = 1,
A6 = 1, A1 = 1,
RESET# = V
group address
A1 = 1, A0 = 0
Sector Group
from RESET#
Sector Group
address with
sector group
PLSCNT = 1
Cycle = 60h?
Remove V
Data = 00h?
Write reset
Wait 15 ms
Read from
First Write
Last sector
protected?
Unprotect:
command
Wait 1 s
All sector
verified?
START
groups
A0 = 0
A0 = 0
group
Yes
Yes
Yes
Yes
ID
ID
September 20, 2002
No
No
next sector group
Temporary Sector
Group Unprotect
address
Set up
Mode