S25FL008A Meet Spansion Inc., S25FL008A Datasheet - Page 8

• Manufacturer Part Number: S25FL008A
• Description: 8-megabit Cmos 3.0 Volt Flash Memory With 50 Mhz Spi Bus Interface
• Manufacturer: Meet Spansion Inc.

3. Input/Output Descriptions
4. Logic Symbol
8
HOLD#
Signal
GND
SCK
CS#
V
SO
W#
SI
CC
Output
Input
Input
Input
Input
Input
Input
Input
I/O
Signal Data Output: Transfers data serially out of the device on the falling edge of SCK.
Serial Data Input: Transfers data serially into the device. Device latches commands, addresses,
and program data on SI on the rising edge of SCK.
Serial Clock: 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.
Chip Select: 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.
Hold: 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.
Write Protect: 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#
SCK
CS#
W#
S25FL008A
SI
D a t a
V
GND
CC
S h e e t
Description
SO
S25FL008A_00_B2 June 29, 2007