S25FL008K Meet Spansion Inc., S25FL008K Datasheet - Page 40

• Manufacturer Part Number: S25FL008K
• Description: 8-mbit Cmos 3.0 Volt Flash Memory With 104-mhz Spi Serial Peripheral Interface Multi I/o Bus
• Manufacturer: Meet Spansion Inc.

40
6.2.25
6.2.26
Deep Power-down (B9h)
Release from Deep Power-down / Device ID (ABh)
Although the standby current during normal operation is relatively low, standby current can be further reduced
with the Deep Power-down instruction. The lower power consumption makes the Deep Power-down
instruction especially useful for battery powered applications (see I
Characteristics on page
code “B9h” as shown in
The CS# pin must be driven high after the eighth bit has been latched. If this is not done the Deep Power-
down instruction will not be executed. After CS# is driven high, the power-down state will entered within the
time duration of t
Release from Deep Power-down / Device ID instruction, which restores the device to normal operation, will
be recognized. All other instructions are ignored. This includes the Read Status Register instruction, which is
always available during normal operation. Ignoring all but one instruction makes the Power Down state a
useful condition for securing maximum write protection. The device always powers-up in the normal operation
with the standby current of I
The Release from Deep Power-down / Device ID instruction is a multi-purpose instruction. It can be used to
release the device from the deep power-down state, or obtain the devices electronic identification (ID)
number.
To release the device from the deep power-down state, the instruction is issued by driving the CS# pin low,
shifting the instruction code “ABh” and driving CS# high as shown in
down will take the time duration of t
will resume normal operation and other instructions are accepted. The CS# pin must remain high during the
t
When used only to obtain the Device ID while not in the deep power-down state, the instruction is initiated by
driving the CS# pin low and shifting the instruction code “ABh” followed by 3-dummy bytes. The Device ID bits
are then shifted out on the falling edge of CLK with most significant bit (MSB) first. The Device ID values for
the S25FL008K is listed in Manufacturer and Device Identification table. The Device ID can be read
continuously. The instruction is completed by driving CS# high.
When used to release the device from the deep power-down state and obtain the Device ID, the instruction is
the same as previously described, and shown in
remain high for a time duration of t
other instructions will be accepted. If the Release from Deep Power-down / Device ID instruction is issued
while an Erase, Program or Write cycle is in process (when BUSY equals 1) the instruction is ignored and will
not have any effects on the current cycle.
CLK
RES1
CS#
SI
time duration.
Mode 3
Mode 0
DP
0
(See AC Electrical Characteristics on page
Figure 6.30 Deep Power-down Instruction Sequence Diagram
1
D a t a
Figure
53). The instruction is initiated by driving the CS# pin low and shifting the instruction
2
Instruction (B9h)
CC1
6.30.
.
3
S h e e t
RES2
RES1
4
. After this time duration the device will resume normal operation and
S25FL008K
5
(See AC Electrical Characteristics on page
6
( A d v a n c e
7
Figure
6.32, except that after CS# is driven high it must
54.). While in the power-down state only the
I n f o r m a t i o n )
t
Standard Current
DP
CC1
Figure
and I
6.31. Release from deep power-
CC2
S25FL008K_00_01 July 30, 2010
in
Mode 3
Mode 0
Section 7.4, DC Electrical
54.) before the device
Deep Power-down Current