S71PL064JB0BFW0B0 Spansion Inc., S71PL064JB0BFW0B0 Datasheet - Page 59

• Manufacturer Part Number: S71PL064JB0BFW0B0
• Manufacturer: Spansion Inc.

Specifications of S71PL064JB0BFW0B0

• Operating Supply Voltage (max): 3.1V
• Operating Temperature (max): 85C
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

May 21, 2004 S29PL127_064_032J_00_A1
Hardware Data Protection
The command sequence requirement of unlock cycles for programming or erasing
provides data protection against inadvertent writes. 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
power-up and power-down transitions, 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
mode. Subsequent writes are ignored until V
must provide the proper signals to the control pins to prevent unintentional writes
when V
Write Pulse “Glitch” Protection
Noise pulses of less than 3 ns (typical) on OE#, CE#, or WE# do not initiate a
write cycle.
Logical Inhibit
Write cycles are inhibited by holding any one of OE# = V
V
logical one.
Power-Up Write Inhibit
If WE# = CE# = V
commands on the rising edge of WE#. The internal state machine is automatically
reset to the read mode on power-up.
IH
. To initiate a write cycle, CE# and WE# must be a logical zero while OE# is a
CC
CC
CC
Write Inhibit
is less than V
is greater than V
IL
CC
P r e l i m i n a r y
Figure 3. SecSi Sector Protect Verify
and OE# = V
S29PL127J/S29PL064J/S29PL032J for MCP
power-up and power-down. The command register and all
Write 40h to SecSi
LKO
Read from SecSi
Sector address
Sector address
A1 = 1, A0 = 0
A1 = 1, A0 = 0
Write 60h to
any address
with A6 = 0,
with A6 = 0,
RESET# =
, the device does not accept any write cycles. This pro-
V
Wait 1 µs
LKO
START
IH
or V
.
ID
IH
during power up, the device does not accept
Remove V
SecSi Sector is
SecSi Sector is
If data = 00h,
If data = 01h,
from RESET#
Protect Verify
SecSi Sector
CC
unprotected.
Write reset
protected.
command
complete
is greater than V
IH
or V
ID
IL
, CE# = V
LKO
. The system
IH
or WE# =
CC
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