FM25L256 Extended Temp.
SCK
MOSI
MISO
SO SI
FM25L256
CS HOLD
SCK
SO SI SCK
FM25L256
SPI
Microcontroller
CS
HOLD
SS1
SS2
HOLD1
HOLD2
MOSI : Master Out Slave In
MISO : Master In Slave Out
SS : Slave Select
D
E
Figure 2. System Configuration with SPI port
D
P1.0
P1.1
S
N
N
SO SI SCK
Microcontroller
G
FM25L256
ME
I
B
CS
HOLD
S
6
M
P1.2
5
E
2
O
L
Figure 3. System Configuration without SPI port
D
5
C
2
SPI Mode 0: CPOL=0, CPHA=0
E
M
W
F
R
:
E
e
v
i
T
N
t
a
O
n
r4
7
6
5
3
2
1
0
R
e
N
t
l
O
A
SPI Mode 3: CPOL=1, CPHA=1
F
7
6
5
4
3
2
1
0
Figure 4. SPI Modes 0 & 3
Rev. 2.3
March 2007
Page 4 of 14
RAMTRON [ RAMTRON INTERNATIONAL CORPORATION ]
