AM29LV800DT-90ED Spansion Inc., AM29LV800DT-90ED Datasheet - Page 16

• Manufacturer Part Number: AM29LV800DT-90ED
• Description: Flash Memory IC
• Manufacturer: Spansion Inc.
• Series: AM29r

Specifications of AM29LV800DT-90ED

• Memory Size: 8Mbit
• Package/case: 48-TSOP
• Supply Voltage Max: 3V
• Leaded Process Compatible: Yes
• Peak Reflow Compatible (260 C): Yes
• Access Time, Tacc: 90nS
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

14
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,
Sector Protect:
sector address
Protect another
RESET# = V
A1 = 1, A0 = 0
A1 = 1, A0 = 0
Sector Protect
from RESET#
Set up sector
Verify Sector
Cycle = 60h?
PLSCNT = 1
address with
Remove V
with A6 = 0,
with A6 = 0,
Wait 150 µs
Data = 01h?
Write reset
Read from
First Write
Wait 1 ms
command
complete
address
START
sector?
A0 = 0
Yes
Yes
No
ID
ID
Yes
Figure 2. In-System Sector Protect/
Sector Unprotect Algorithms
PLSCNT = 1
Reset
D A T A
Am29LV800D
The indicated portion
unprotected sectors
of the sector protect
prior to issuing the
Protect all sectors:
unprotect address
algorithm must be
performed for all
S H E E T
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
40h to sector
from RESET#
Verify Sector
address with
Cycle = 60h?
PLSCNT = 1
address with
with A6 = 1,
Remove V
Data = 00h?
Write reset
Wait 15 ms
Read from
First Write
Last sector
Wait 1 ms
command
All sectors
protected?
complete
address
verified?
START
Am29LV800D_00_A6 May 5, 2006
A0 = 0
A0 = 0
Yes
Yes
Yes
Yes
ID
ID
No
No
Temporary Sector
Unprotect Mode
next sector
address
Set up