S25FL040A Meet Spansion Inc., S25FL040A Datasheet - Page 9

• Manufacturer Part Number: S25FL040A
• Description: Small Sector For Boot And Parameter Storage 4-megabit Cmos 3.0 Volt Flash Memory With 50 Mhz Spi Bus Interface
• Manufacturer: Meet Spansion Inc.

3. Input/Output Descriptions
4. Logic Symbol
July 2, 2007 S25FL040A_00_B2
SO (Signal Data Output)
SI (Serial Data Input)
SCK (Serial Clock)
W# (Write Protect)
CS# (Chip Select)
HOLD# (Hold)
Signal Name
GND
V
CC
Output Transfers data serially out of the device on the falling edge of SCK.
D a t a
Input
Input
Input
Input
Input
Input
Input
I/O
Transfers data serially into the device. Device latches commands, addresses, and
program data on SI on the rising edge of SCK.
Provides serial interface timing. Latches commands, addresses, and data on SI on
rising edge of SCK. Triggers output on SO after the falling edge of SCK.
Places device in active power mode when driven low. Deselects device and places
SO at high impedance when high. After power-up, device requires a falling edge on
CS# before any command is written. Device is in standby mode when a program,
erase, or Write Status Register operation is not in progress.
Pauses any serial communication with the device without deselecting it. When driven
low, SO is at high impedance, and all input at SI and SCK are ignored. Requires that
CS# also be driven low.
Protects the memory area specified by Status Register bits BP2:BP0. When driven
low, prevents any program or erase command from altering the data in the protected
memory area.
Supply Voltage
Ground
HOLD#
S h e e t
SCK
CS#
W#
SI
S25FL040A
GND
V
CC
Description
SO
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