S29GL064A90TFIR4 Spansion Inc., S29GL064A90TFIR4 Datasheet - Page 48

• Manufacturer Part Number: S29GL064A90TFIR4
• Manufacturer: Spansion Inc.

Specifications of S29GL064A90TFIR4

• Cell Type: NOR
• Density: 64Mb
• Access Time (max): 90ns
• Interface Type: Parallel
• Boot Type: Bottom
• Address Bus: 23/22Bit
• Operating Supply Voltage (typ): 3/3.3V
• Operating Temp Range: -40C to 85C
• Package Type: TSOP
• Sync/async: Asynchronous
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Word Size: 8/16Bit
• Number Of Words: 8M/4M
• Supply Current: 50mA
• Mounting: Surface Mount
• Pin Count: 48
• Lead Free Status / Rohs Status: Compliant

7.12
7.13
48
7.11.2
7.13.1
7.13.2
7.13.3
7.13.4
Write Protect (WP#)
Hardware Data Protection
Factory Locked: Secured Silicon Sector Programmed and Protected At the
Factory
Low V
Write Pulse Glitch Protection
Logical Inhibit
Power-Up Write Inhibit
In devices with an ESN, the Secured Silicon Sector is protected when the device is shipped from the factory.
The Secured Silicon Sector cannot be modified in any way. An ESN Factory Locked device has an 16-byte
random ESN at addresses 000000h–000007h. Please contact your sales representative for details on
ordering ESN Factory Locked devices.
Customers may opt to have their code programmed by the factory through the Spansion programming
service (Customer Factory Locked). The devices are then shipped from the factory with the Secured Silicon
Sector permanently locked. Contact your sales representative for details on using the Spansion programming
service.
The Write Protect function provides a hardware method of protecting the first or last sector group without
using V
If the system asserts V
last sector group independently of whether those sector groups were protected or unprotected. Note that if
WP#/ACC is at V
the table in
If the system asserts V
previously set to be protected or unprotected using the method described in
and Unprotection on page
at V
The command sequence requirement of unlock cycles for programming or erasing provides data protection
against inadvertent writes (refer to
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
power-down transitions, or from system noise.
When V
power-up and power-down. The command register and all internal program/erase circuits are disabled, and
the device resets to the read mode. Subsequent writes are ignored until V
system must provide the proper signals to the control pins to prevent unintentional writes when V
than V
Noise pulses of less than 3 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 the read mode on power-up.
IH
.
LKO
CC
ID
CC
. Write Protect is one of two functions provided by the WP#/ACC input.
.
Write Inhibit
is less than V
DC Characteristics on page
IL
IL
when the device is in the standby mode, the maximum input load current is increased. See
and OE# = V
IL
IH
on the WP#/ACC pin, the device disables program and erase functions in the first or
LKO
on the WP#/ACC pin, the device reverts to whether the first or last sector was
41. Note that WP# contains an internal pull-up; when unconnected, WP# is
, the device does not accept any write cycles. This protects data during V
IH
Table 10.2 on page 61
during power up, the device does not accept commands on the rising
70.
S29GL-A
D a t a
S h e e t
IL
, CE# = V
and
Table 10.1 on page 62
IH
or WE# = V
CC
is greater than V
S29GL-A_00_A12 May 21, 2008
IH
Sector Group Protection
. To initiate a write cycle,
for command
CC
power-up and
LKO
CC
. The
is greater
CC