S29JL032H70TFI020 Spansion Inc., S29JL032H70TFI020 Datasheet - Page 26

• Manufacturer Part Number: S29JL032H70TFI020
• Description: IC,EEPROM,NOR FLASH,2MX16/4MX8,CMOS,TSSOP,48PIN,PLASTIC
• Manufacturer: Spansion Inc.

Specifications of S29JL032H70TFI020

• Data Bus Width: 8 bit, 16 bit
• Architecture: Boot Sector
• Interface Type: Conventional
• Access Time: 70 ns
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 2.7 V
• Maximum Operating Current: 2 mA
• Mounting Style: SMD/SMT
• Memory Type: Flash
• Memory Size: 32 Mbit
• Operating Temperature: + 85 C
• Package / Case: TSOP-48
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

26
Hardware Data Protection
The SecSi Sector area can be protected using one of the following procedures:
Once the SecSi Sector is locked and verified, the system must write the Exit SecSi
Sector Region command sequence to return to reading and writing the remainder
of the array.
The SecSi Sector lock must be used with caution since, once locked, there is no
procedure available for unlocking the SecSi Sector area and none of the bits in
the SecSi Sector memory space can be modified in any way.
The command sequence requirement of unlock cycles for programming or erasing
provides data protection against inadvertent writes (refer to Table
mand definitions). In addition, the following hardware data protection measures
prevent accidental erasure or programming, which might otherwise be caused by
spurious system level signals during V
or from system noise.
Low V
When V
tects data during V
internal program/erase circuits are disabled, and the device resets to the read
Write the three-cycle Enter SecSi Sector Region command sequence, and
then follow the in-system sector protect algorithm as shown in
cept that RESET# may be at either V
tion of the SecSi Sector Region without raising any device pin to a high
voltage. Note that this method is only applicable to the SecSi Sector.
To verify the protect/unprotect status of the SecSi Sector, follow the algo-
rithm shown in
CC
CC
is less than V
Write Inhibit
Figure 3. SecSi Sector Protect Verify
Figure
CC
power-up and power-down. The command register and all
Write 40h to SecSi
LKO
Read from SecSi
Sector address
A1 = 1, A0 = 0
A1 = 1, A0 = 0
Sector address
Write 60h to
with A6 = 0,
with A6 = 0,
any address
3.
, the device does not accept any write cycles. This pro-
RESET# =
A D V A N C E
Wait 1 ms
V
IH
START
or V
ID
S29JL032H
CC
IH
power-up and power-down transitions,
Remove V
or V
If data = 00h,
SecSi Sector is
If data = 01h,
SecSi Sector is
from RESET#
Protect Verify
unprotected.
I N F O R M A T I O N
SecSi Sector
Write reset
protected.
command
complete
ID
. This allows in-system protec-
IH
or V
ID
Figure
13
for com-
2, ex-
S29JL032HA0 May 21, 2004