ESMT
PIN DESCRIPTION
Symbol
SCK
SI
Pin Name
Serial Clock
Serial Data Input
Functions
To provide the timing for serial input and
output operations
To transfer commands, addresses or data
serially into the device.
Data is latched on the rising edge of SCK.
To transfer data serially out of the device.
Data is shifted out on the falling edge of
SCK.
To activate the device when CE is low.
The Write Protect (
WP
) pin is used to
enable/disable BPL bit in the status
register.
To temporality stop serial communication
with SPI flash memory without resetting
the device.
To provide power.
F25L08PA
SO
CE
WP
Serial Data Output
Chip Enable
Write Protect
HOLD
VDD
VSS
Hold
Power Supply
Ground
FUNCTIONAL BLOCK DIAGRAM
Address
Buffers
and
Latches
X-Decoder
Flash
Y-Decoder
Control Logic
I/O Butters
and
Data Latches
Serial Interface
CE
SCK
SI
SO
WP
HOLD
Elite Semiconductor Memory Technology Inc.
Publication Date:
Jul. 2009
Revision: 1.7
3/32
ESMT [ ELITE SEMICONDUCTOR MEMORY TECHNOLOGY INC. ]
