s29jl064j Meet Spansion Inc., s29jl064j Datasheet - Page 16

• Manufacturer Part Number: s29jl064j
• Description: 64 Megabit 8m X 8-bit/4m X 16-bit Cmos 3.0 Volt-only, Simultaneous Read/write Flash Memory
• Manufacturer: Meet Spansion Inc.

8.4
8.5
8.6
8.7
16
Simultaneous Read/Write Operations with Zero Latency
Standby Mode
Automatic Sleep Mode
RESET#: Hardware Reset Pin
This device is capable of reading data from one bank of memory while programming or erasing in another
bank of memory. An erase operation may also be suspended to read from or program to another location
within the same bank (except the sector being erased).
cycles may be initiated for simultaneous operation with zero latency. I
on page 43
When the system is not reading or writing to the device, it can place the device in the standby mode. In this
mode, current consumption is greatly reduced, and the outputs are placed in the high impedance state,
independent of the OE# input.
The device enters the CMOS standby mode when the CE# and RESET# pins are both held at V
(Note that this is a more restricted voltage range than V
V
requires standard access time (t
before it is ready to read data.
If the device is deselected during erasure or programming, the device draws active current until the operation
is completed.
I
The automatic sleep mode minimizes Flash device energy consumption. The device automatically enables
this mode when addresses remain stable for t
CE#, WE#, and OE# control signals. Standard address access timings provide new data when addresses are
changed. While in sleep mode, output data is latched and always available to the system. I
Characteristics on page 43
The RESET# pin provides a hardware method of resetting the device to reading array data. When the
RESET# pin is driven low for at least a period of t
progress, tristates all output pins, and ignores all read/write commands for the duration of the RESET# pulse.
The device also resets the internal state machine to reading array data. The operation that was interrupted
should be reinitiated once the device is ready to accept another command sequence, to ensure data integrity.
Current is reduced for the duration of the RESET# pulse. When RESET# is held at V
draws CMOS standby current (I
will be greater.
The RESET# pin may be tied to the system reset circuitry. A system reset would thus also reset the Flash
memory, enabling the system to read the boot-up firmware from the Flash memory. Note that the CE# pin
should only go to V
could cause the first read to retrieve erroneous data.
If RESET# is asserted during a program or erase operation, the RY/BY# pin remains a “0” (busy) until the
internal reset operation is complete, which requires a time of t
system can thus monitor RY/BY# to determine whether the reset operation is complete. If RESET# is
asserted when a program or erase operation is not executing (RY/BY# pin is “1”), the reset operation is
completed within a time of t
RESET# pin returns to V
Refer to
the timing diagram.
CC3
CC
± 0.3V, the device will be in the standby mode, but the standby current will be greater. The device
in
DC Characteristics on page 43
Hardware Reset (RESET#) on page 47
represent the current specifications for read-while-program and read-while-erase, respectively.
IL
after RESET# has gone to V
IH
.
READY
represents the automatic sleep mode current specification.
CC4
CE
(not during Embedded Algorithms). The system can read data t
) for read access when the device is in either of these standby modes,
). If RESET# is held at V
represents the standby current specification.
S29JL064J
D a t a
ACC
for RESET# parameters and to
RP
IH
+ 30 ns. The automatic sleep mode is independent of the
. Keeping CE# at V
, the device immediately terminates any operation in
S h e e t
IH
Figure 17.8 on page 51
.) If CE# and RESET# are held at V
IL
READY
but not within V
(during Embedded Algorithms). The
CC6
IL
from power up through the first read
and I
SS
S29JL064J_00_03 April 7, 2011
CC7
shows how read and write
Figure 17.2 on page 47
±0.3V, the standby current
in the
SS
±0.3V, the device
DC Characteristics
CC5
IH
, but not within
in
CC
RH
DC
± 0.3V.
after the
for