S29AL032D70TFI000 Spansion Inc., S29AL032D70TFI000 Datasheet - Page 30

• Manufacturer Part Number: S29AL032D70TFI000
• Description: Flash Memory IC
• Manufacturer: Spansion Inc.

Specifications of S29AL032D70TFI000

• Memory Size: 32Mbit
• Memory Configuration: 4M X 8
• Ic Interface Type: CFI, Parallel
• Access Time: 70ns
• Supply Voltage Range: 2.7 To 3.6 V
• Memory Case Style: TSOP
• No. Of Pins: 40

9. Hardware Data Protection
9.1
9.2
9.3
9.4
28
Low V
Write Pulse “Glitch” Protection
Logical Inhibit
Power-Up Write Inhibit
The command sequence requirement of unlock cycles for programming or erasing provides data protection
against inadvertent writes (refer to
hardware data protection measures prevent accidental erasure or programming, which might otherwise be
caused by spurious system level signals during V
noise.
When V
power-up and power-down. The command register and all internal program/erase circuits are disabled, and
the device resets. Subsequent writes are ignored until V
proper signals to the control pins to prevent unintentional writes when V
Noise pulses of less than 5 ns (typical) on OE#, CE# or WE# do not initiate a write cycle.
Write cycles are inhibited by holding any one of OE# = V
CE# and WE# must be a logical zero while OE# is a logical one.
If WE# = CE# = V
edge of WE#. The internal state machine is automatically reset to reading array data on power-up.
CC
Write Inhibit
CC
is less than V
IL
and OE# = V
LKO
, the device does not accept any write cycles. This protects data during V
Figure 8.1 Secured Silicon Sector Protect Verify
IH
Table 11.2 on page 38
during power up, the device does not accept commands on the rising
Write 40h to SecSi
Read from SecSi
Sector address
S29AL032D
Sector address
A1 = 1, A0 = 0
A1 = 1, A0 = 0
Write 60h to
any address
with A6 = 0,
with A6 = 0,
RESET# =
Wait 1 ms
V
START
IH
D a t a
or V
ID
CC
power-up and power-down transitions, or from system
S h e e t
CC
IL
for command definitions). In addition, the following
, CE# = V
is greater than V
Remove V
SecSi Sector is
SecSi Sector is
If data = 00h,
If data = 01h,
from RESET#
SecSi Sector
Protect Verify
unprotected.
Write reset
protected.
command
complete
IH
IH
or WE# = V
or V
CC
ID
LKO
is greater than V
. The system must provide the
S29AL032D_00_A9 January 19, 2007
IH
. To initiate a write cycle,
LKO
.
CC