S25FL004A Meet Spansion Inc., S25FL004A Datasheet - Page 25

• Manufacturer Part Number: S25FL004A
• Description: 4-megabit Cmos 3.0 Volt Flash Memory With 50 Mhz Spi Bus Interface
• Manufacturer: Meet Spansion Inc.

10. Power-up and Power-down
11. Initial Delivery State
July 9, 2007 S25FL004A_00_B3
2. The S25FL004A has an Electronic Signature ID of 12h.
During power-up and power-down, certain conditions must be observed. CS# must follow the voltage applied
on V
(see
A pull-up resistor on Chip Select (CS#) typically meets proper power-up and power-down requirements.
No Write Status Register, program, or erase command should be sent to the device until V
min, plus a delay of t
WEL bit is reset (0).
Each device in the host system should have the V
package pins (this capacitor is generally of the order of 0.1 µF), as a precaution to stabilizing the V
When V
operations are disabled and the device does not respond to any commands. Note that data corruption may
result if a power-down occurs while a Write Register, program, or erase operation is in progress.
The device is delivered with all bits set to 1 (each byte contains FFh) upon initial factory shipment. The Status
Register contains 00h (all Status Register bits are 0).
At power-up, V
At power-down, V
CC
Figure 10.1 on page 25
Symbol
V
CC(min)
, and must not be driven low to select the device until V
t
CC
PU
drops from the operating voltage to below the minimum V
CC
V
V
SS
(min) plus a period of t
PU
cc
cc
(max)
(min)
. At power-up, the device is in standby mode (not Deep Power Down mode) and the
V
D a t a
cc
and
Table 10.1 Power-Up Timing Characteristics
Table 10.1 on page
Figure 10.1 Power-Up Timing Diagram
S h e e t
V
CC
(min) to device operation
S25FL004A
V
CC
Parameter
PU
(minimum)
t
CC
PU
rail decoupled by a suitable capacitor close to the
25):
CC
reaches the allowable values as follows
Full Device Access
CC
threshold at power-down, all
Min
Time
2.7
10
CC
Max
rises to the V
CC
feed.
Unit
ms
V
CC
25